Radarr not starting

Hello everyone
My radarr has not been working for a while now. Can someone please help?
Thanks.
ps: I can try a fresh install but not sure how to save the existing data/ profile.

│ ● radarr.service - Radarr (DietPi)                                                                                   │
│      Loaded: loaded (/etc/systemd/system/radarr.service; enabled; vendor preset: enabled)                            │
│     Drop-In: /etc/systemd/system/radarr.service.d                                                                    │
│              └─dietpi-services_edit.conf                                                                             │
│      Active: failed (Result: exit-code) since Wed 2024-11-27 22:06:03 AEDT; 1s ago                                   │
│     Process: 172136 ExecStart=/opt/radarr/Radarr -nobrowser -data=/mnt/dietpi_userdata/radarr (code=exited,          │
│ status=154)                                                                                                          │
│    Main PID: 172136 (code=exited, status=154)                                                                        │
│         CPU: 113ms

you would need to check logs

journalctl -u radarr.service
root@DietPi:~# journalctl -u radarr.service
-- Journal begins at Mon 2024-11-25 15:20:33 AEDT, ends at Wed 2024-11-27 23:12:36 AEDT. --
Nov 27 22:06:02 DietPi systemd[1]: Started Radarr (DietPi).
Nov 27 22:06:02 DietPi Radarr[172118]: The application to execute does not exist: '/opt/radarr/Radarr.dll'.
Nov 27 22:06:02 DietPi systemd[1]: radarr.service: Main process exited, code=exited, status=154/n/a
Nov 27 22:06:02 DietPi systemd[1]: radarr.service: Failed with result 'exit-code'.
Nov 27 22:06:02 DietPi systemd[1]: radarr.service: Scheduled restart job, restart counter is at 1.
Nov 27 22:06:02 DietPi systemd[1]: Stopped Radarr (DietPi).
Nov 27 22:06:02 DietPi systemd[1]: Started Radarr (DietPi).
Nov 27 22:06:02 DietPi Radarr[172121]: The application to execute does not exist: '/opt/radarr/Radarr.dll'.
Nov 27 22:06:02 DietPi systemd[1]: radarr.service: Main process exited, code=exited, status=154/n/a
Nov 27 22:06:02 DietPi systemd[1]: radarr.service: Failed with result 'exit-code'.
Nov 27 22:06:02 DietPi systemd[1]: radarr.service: Scheduled restart job, restart counter is at 2.
Nov 27 22:06:02 DietPi systemd[1]: Stopped Radarr (DietPi).
Nov 27 22:06:02 DietPi systemd[1]: Started Radarr (DietPi).
Nov 27 22:06:02 DietPi Radarr[172134]: The application to execute does not exist: '/opt/radarr/Radarr.dll'.
Nov 27 22:06:02 DietPi systemd[1]: radarr.service: Main process exited, code=exited, status=154/n/a
Nov 27 22:06:02 DietPi systemd[1]: radarr.service: Failed with result 'exit-code'.
Nov 27 22:06:03 DietPi systemd[1]: radarr.service: Scheduled restart job, restart counter is at 3.
Nov 27 22:06:03 DietPi systemd[1]: Stopped Radarr (DietPi).
Nov 27 22:06:03 DietPi systemd[1]: Started Radarr (DietPi).
Nov 27 22:06:03 DietPi Radarr[172135]: The application to execute does not exist: '/opt/radarr/Radarr.dll'.
Nov 27 22:06:03 DietPi systemd[1]: radarr.service: Main process exited, code=exited, status=154/n/a
Nov 27 22:06:03 DietPi systemd[1]: radarr.service: Failed with result 'exit-code'.
Nov 27 22:06:03 DietPi systemd[1]: radarr.service: Scheduled restart job, restart counter is at 4.
Nov 27 22:06:03 DietPi systemd[1]: Stopped Radarr (DietPi).
Nov 27 22:06:03 DietPi systemd[1]: Started Radarr (DietPi).
Nov 27 22:06:03 DietPi Radarr[172136]: The application to execute does not exist: '/opt/radarr/Radarr.dll'.
Nov 27 22:06:03 DietPi systemd[1]: radarr.service: Main process exited, code=exited, status=154/n/a
Nov 27 22:06:03 DietPi systemd[1]: radarr.service: Failed with result 'exit-code'.
Nov 27 22:06:03 DietPi systemd[1]: radarr.service: Scheduled restart job, restart counter is at 5.
Nov 27 22:06:03 DietPi systemd[1]: Stopped Radarr (DietPi).
Nov 27 22:06:03 DietPi systemd[1]: radarr.service: Start request repeated too quickly.
Nov 27 22:06:03 DietPi systemd[1]: radarr.service: Failed with result 'exit-code'.
Nov 27 22:06:03 DietPi systemd[1]: Failed to start Radarr (DietPi).

can you check content of Radarr directory

ls -la /opt/radarr/

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root@DietPi:~# ls -la /opt/radarr
total 27976
drwxr-xr-x 2 radarr dietpi 32768 Oct 15 16:25 .
drwxr-xr-x 4 root root 4096 Jul 2 10:29 …
-rw-rw-r-- 1 radarr dietpi 167424 Sep 25 15:57 Dynamitey.dll
-rw-rw-r-- 1 radarr dietpi 9216 Sep 25 15:57 FluentMigrator.Extensions.SqlAnywhere.dll-rw-rw-r-- 1 radarr dietpi 46592 Sep 25 15:57 FluentMigrator.Runner.Postgres.dll
-rw-rw-r-- 1 radarr dietpi 37376 Sep 25 15:57 FluentMigrator.Runner.SqlAnywhere.dll
-rw-rw-r-- 1 radarr dietpi 20480 Sep 25 15:57 FluentMigrator.Runner.SqlServerCe.dll
-rw-rw-r-- 1 radarr dietpi 113312 Sep 25 15:57 Microsoft.AspNetCore.Antiforgery.dll
-rw-rw-r-- 1 radarr dietpi 58528 Sep 25 15:57 Microsoft.AspNetCore.Authentication.Abstractions.dll
-rw-rw-r-- 1 radarr dietpi 161952 Sep 25 15:57 Microsoft.AspNetCore.Authentication.dll
-rw-rw-r-- 1 radarr dietpi 631968 Sep 25 15:57 Microsoft.AspNetCore.Components.dll
-rw-rw-r-- 1 radarr dietpi 23320 Sep 25 15:57 Microsoft.AspNetCore.Cryptography.KeyDerivation.dll
-rw-rw-r-- 1 radarr dietpi 44192 Sep 25 15:57 Microsoft.AspNetCore.DataProtection.Abstractions.dll
-rw-rw-r-- 1 radarr dietpi 433312 Sep 25 15:57 Microsoft.AspNetCore.Diagnostics.dll
-rw-rw-r-- 1 radarr dietpi 39072 Sep 25 15:57 Microsoft.AspNetCore.HostFiltering.dll
-rw-rw-r-- 1 radarr dietpi 426672 Sep 25 15:57 Microsoft.AspNetCore.Hosting.dll
-rw-rw-r-- 1 radarr dietpi 523016 Sep 25 15:57 Microsoft.AspNetCore.Mvc.RazorPages.dll
-rw-rw-r-- 1 radarr dietpi 839448 Sep 25 15:57 Microsoft.AspNetCore.Routing.dll
-rw-rw-r-- 1 radarr dietpi 641800 Sep 25 15:57 Microsoft.AspNetCore.Server.HttpSys.dll
-rw-rw-r-- 1 radarr dietpi 169224 Sep 25 15:57 Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets.dll
-rw-rw-r-- 1 radarr dietpi 446728 Sep 25 15:57 Microsoft.AspNetCore.SignalR.Core.dll
-rw-rw-r-- 1 radarr dietpi 170272 Sep 25 15:57 Microsoft.AspNetCore.StaticFiles.dll
-rw-rw-r-- 1 radarr dietpi 116384 Sep 25 15:57 Microsoft.AspNetCore.dll
-rw-rw-r-- 1 radarr dietpi 953008 Sep 25 15:57 Microsoft.CSharp.dll
-rw-rw-r-- 1 radarr dietpi 25760 Sep 25 15:57 Microsoft.Extensions.Configuration.EnvironmentVariables.dll
-rw-rw-r-- 1 radarr dietpi 36512 Sep 25 15:57 Microsoft.Extensions.Configuration.Ini.dll
-rw-rw-r-- 1 radarr dietpi 37536 Sep 25 15:57 Microsoft.Extensions.Configuration.UserSecrets.dll
-rw-rw-r-- 1 radarr dietpi 104096 Sep 25 15:57 Microsoft.Extensions.FileSystemGlobbing.dll
-rw-rw-r-- 1 radarr dietpi 24336 Sep 25 15:57 Microsoft.Extensions.Localization.Abstractions.dll
-rw-rw-r-- 1 radarr dietpi 39696 Sep 25 15:57 Microsoft.Extensions.Logging.EventLog.dll-rw-rw-r-- 1 radarr dietpi 34992 Sep 25 15:57 Microsoft.Extensions.Options.ConfigurationExtensions.dll
-rw-rw-r-- 1 radarr dietpi 33544 Sep 25 15:57 Microsoft.Extensions.WebEncoders.dll
root@DietPi:~# ls -la /opt/radarr
total 27976
drwxr-xr-x 2 radarr dietpi 32768 Oct 15 16:25 .
drwxr-xr-x 4 root root 4096 Jul 2 10:29 …
-rw-rw-r-- 1 radarr dietpi 167424 Sep 25 15:57 Dynamitey.dll
-rw-rw-r-- 1 radarr dietpi 9216 Sep 25 15:57 FluentMigrator.Extensions.SqlAnywhere.dll-rw-rw-r-- 1 radarr dietpi 46592 Sep 25 15:57 FluentMigrator.Runner.Postgres.dll
-rw-rw-r-- 1 radarr dietpi 37376 Sep 25 15:57 FluentMigrator.Runner.SqlAnywhere.dll
-rw-rw-r-- 1 radarr dietpi 20480 Sep 25 15:57 FluentMigrator.Runner.SqlServerCe.dll
-rw-rw-r-- 1 radarr dietpi 113312 Sep 25 15:57 Microsoft.AspNetCore.Antiforgery.dll
-rw-rw-r-- 1 radarr dietpi 58528 Sep 25 15:57 Microsoft.AspNetCore.Authentication.Abstractions.dll -rw-rw-r-- 1 radarr dietpi 161952 Sep 25 15:57 Microsoft.AspNetCore.Authentication.dll
-rw-rw-r-- 1 radarr dietpi 631968 Sep 25 15:57 Microsoft.AspNetCore.Components.dll
-rw-rw-r-- 1 radarr dietpi 23320 Sep 25 15:57 Microsoft.AspNetCore.Cryptography.KeyDerivation.dll
-rw-rw-r-- 1 radarr dietpi 44192 Sep 25 15:57 Microsoft.AspNetCore.DataProtection.Abstractions.dll
-rw-rw-r-- 1 radarr dietpi 433312 Sep 25 15:57 Microsoft.AspNetCore.Diagnostics.dll
-rw-rw-r-- 1 radarr dietpi 39072 Sep 25 15:57 Microsoft.AspNetCore.HostFiltering.dll
-rw-rw-r-- 1 radarr dietpi 426672 Sep 25 15:57 Microsoft.AspNetCore.Hosting.dll
-rw-rw-r-- 1 radarr dietpi 523016 Sep 25 15:57 Microsoft.AspNetCore.Mvc.RazorPages.dll
-rw-rw-r-- 1 radarr dietpi 839448 Sep 25 15:57 Microsoft.AspNetCore.Routing.dll
-rw-rw-r-- 1 radarr dietpi 641800 Sep 25 15:57 Microsoft.AspNetCore.Server.HttpSys.dll
-rw-rw-r-- 1 radarr dietpi 169224 Sep 25 15:57 Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets.dll
-rw-rw-r-- 1 radarr dietpi 446728 Sep 25 15:57 Microsoft.AspNetCore.SignalR.Core.dll
-rw-rw-r-- 1 radarr dietpi 170272 Sep 25 15:57 Microsoft.AspNetCore.StaticFiles.dll
-rw-rw-r-- 1 radarr dietpi 116384 Sep 25 15:57 Microsoft.AspNetCore.dll
-rw-rw-r-- 1 radarr dietpi 953008 Sep 25 15:57 Microsoft.CSharp.dll
-rw-rw-r-- 1 radarr dietpi 25760 Sep 25 15:57 Microsoft.Extensions.Configuration.EnvironmentVariables.dll
-rw-rw-r-- 1 radarr dietpi 36512 Sep 25 15:57 Microsoft.Extensions.Configuration.Ini.dll
-rw-rw-r-- 1 radarr dietpi 37536 Sep 25 15:57 Microsoft.Extensions.Configuration.UserSecrets.dll
-rw-rw-r-- 1 radarr dietpi 104096 Sep 25 15:57 Microsoft.Extensions.FileSystemGlobbing.dll -rw-rw-r-- 1 radarr dietpi 24336 Sep 25 15:57 Microsoft.Extensions.Localization.Abstractions.dll
-rw-rw-r-- 1 radarr dietpi 39696 Sep 25 15:57 Microsoft.Extensions.Logging.EventLog.dll-rw-rw-r-- 1 radarr dietpi 34992 Sep 25 15:57 Microsoft.Extensions.Options.ConfigurationExtensions.dll
-rw-rw-r-- 1 radarr dietpi 33544 Sep 25 15:57 Microsoft.Extensions.WebEncoders.dll
-rw-rw-r-- 1 radarr dietpi 1310664 Sep 25 15:57 Microsoft.Identity.Client.dll
-rw-rw-r-- 1 radarr dietpi 498176 Sep 25 15:57 NodaTime.dll
-rwxr-xr-x 1 radarr dietpi 200424 Sep 25 15:57 Radarr
-rw-rw-r-- 1 radarr dietpi 262144 Sep 25 15:57 Radarr.Common.dll
-rw-rw-r-- 1 radarr dietpi 2356224 Sep 25 15:57 Radarr.Core.dll
-rw-rw-r-- 1 radarr dietpi 136 Sep 25 15:57 Radarr.Host.xml
-rw-rw-r-- 1 radarr dietpi 35156 Sep 25 15:57 Radarr.Mono.pdb -rw-rw-r-- 1 radarr dietpi 136 Sep 25 15:57 Radarr.Mono.xml
-rw-rw-r-- 1 radarr dietpi 139 Sep 25 15:57 Radarr.SignalR.xml
-rw-rw-r-- 1 radarr dietpi 15520 Sep 25 15:57 System.AppContext.dll
-rw-rw-r-- 1 radarr dietpi 310544 Sep 25 15:57 System.Collections.dll
-rw-rw-r-- 1 radarr dietpi 17672 Sep 25 15:57 System.ComponentModel.DataAnnotations.dll-rw-rw-r-- 1 radarr dietpi 86688 Sep 25 15:57 System.ComponentModel.Primitives.dll
-rw-rw-r-- 1 radarr dietpi 19208 Sep 25 15:57 System.ComponentModel.dll
-rw-rw-r-- 1 radarr dietpi 25760 Sep 25 15:57 System.Data.dll
-rw-rw-r-- 1 radarr dietpi 62112 Sep 25 15:57 System.Diagnostics.EventLog.dll
-rw-rw-r-- 1 radarr dietpi 37536 Sep 25 15:57 System.Diagnostics.StackTrace.dll
-rw-rw-r-- 1 radarr dietpi 139424 Sep 25 15:57 System.Drawing.Primitives.dll
-rw-rw-r-- 1 radarr dietpi 21152 Sep 25 15:57 System.Drawing.dll
-rw-rw-r-- 1 radarr dietpi 16152 Sep 25 15:57 System.IO.Compression.FileSystem.dll
-rw-rw-r-- 1 radarr dietpi 306968 Sep 25 15:57 System.IO.Compression.dll
-rw-rw-r-- 1 radarr dietpi 86808 Sep 25 15:57 System.IO.FileSystem.DriveInfo.dll
-rw-rw-r-- 1 radarr dietpi 108304 Sep 25 15:57 System.IO.FileSystem.Watcher.dll
-rw-rw-r-- 1 radarr dietpi 90888 Sep 25 15:57 System.IO.IsolatedStorage.dll
-rw-rw-r-- 1 radarr dietpi 143624 Sep 25 15:57 System.IO.Pipes.dll
-rw-rw-r-- 1 radarr dietpi 278792 Sep 25 15:57 System.Linq.Queryable.dll
-rw-rw-r-- 1 radarr dietpi 199432 Sep 25 15:57 System.Memory.dll
-rw-rw-r-- 1 radarr dietpi 336136 Sep 25 15:57 System.Net.Quic.dll
-rw-rw-r-- 1 radarr dietpi 84752 Sep 25 15:57 System.Net.WebSockets.Client.dll
-rw-rw-r-- 1 radarr dietpi 16032 Sep 25 15:57 System.Numerics.dll
-rw-rw-r-- 1 radarr dietpi 71952 Sep 25 15:57 System.Reflection.DispatchProxy.dll
-rw-rw-r-- 1 radarr dietpi 16656 Sep 25 15:57 System.Reflection.dll
-rw-rw-r-- 1 radarr dietpi 31496 Sep 25 15:57 System.Runtime.InteropServices.RuntimeInformation.dll
-rw-rw-r-- 1 radarr dietpi 30488 Sep 25 15:57 System.Runtime.Serialization.Primitives.dll
-rw-rw-r-- 1 radarr dietpi 104208 Sep 25 15:57 System.Security.Claims.dll
-rw-rw-r-- 1 radarr dietpi 113928 Sep 25 15:57 System.Security.Cryptography.Encoding.dll-rw-rw-r-- 1 radarr dietpi 20592 Sep 25 15:57 System.Security.Cryptography.ProtectedData.dll
-rw-rw-r-- 1 radarr dietpi 16136 Sep 25 15:57 System.Text.Encoding.dll
-rw-rw-r-- 1 radarr dietpi 142600 Sep 25 15:57 System.Threading.Channels.dll
-rw-rw-r-- 1 radarr dietpi 17056 Sep 25 15:57 System.Transactions.dll
-rw-rw-r-- 1 radarr dietpi 57616 Sep 25 15:57 System.Web.HttpUtility.dll
-rw-rw-r-- 1 radarr dietpi 16560 Sep 25 15:57 System.Xml.Linq.dll
-rw-rw-r-- 1 radarr dietpi 16544 Sep 25 15:57 System.Xml.Serialization.dll
-rw-rw-r-- 1 radarr dietpi 199424 Sep 25 15:57 createdump
-rwxr-xr-x 1 radarr dietpi 12434136 Sep 25 15:57 ffprobe
-rw-rw-r-- 1 radarr dietpi 312464 Sep 25 15:57 libMonoPosixHelper.so
-rw-rw-r-- 1 radarr dietpi 198944 Sep 25 15:57 libSystem.Native.so
-rw-rw-r-- 1 radarr dietpi 198968 Sep 25 15:57 libSystem.Security.Cryptography.Native.OpenSsl.so
-rw-rw-r-- 1 radarr dietpi 858808 Sep 25 15:57 libcoreclrtraceptprovider.so
-rw-rw-r-- 1 radarr dietpi 101536 Sep 25 15:57 netstandard.dll
root@DietPi:~#