hi, i upgrated my dietpi to lastest version today and reinstalled softwares. after qbittorrent install, i cannot login on webgui. tried different combinations;
qbittorrent / dietpi
qbittorrent / adminadmin
qbittorrent / myglobalpass
root / dietpi
root / adminadmin
root / myglobalpass
no result.
searched forums, tried to config qbittorrent.conf webgui password line. nothing.
please help me to find right solution.
qbittorrent / dietpi still works for me on latest updates 
sc355
I could replicate the issue. Even removing the user and password from the config file and restarting the service didnāt allow me to login the web UI: https://github.com/qbittorrent/qBittorrent/wiki/Web-UI-password-locked-on-qBittorrent-NO-X-(qbittorrent-nox)
But also there is no wrong user/password warning, so it seems to be another issue actually. Is that true in your case as well when you use qbittorrent / myglobalpass?
Hah, tried it with another browser (Edge) and there it worked. On Opera it still does notā¦
Logged in with Edge with default user/password (admin/adminadmin) after removing user and password lines from config + restart. Then adjusted both in web UI and compared to how we add it in dietpi-software: Exactly the same!
So it seems to be a browser specific issue. Please verify that this is the case for you as well (e.g. it works with Microsoft Edge). Then we need to report to qBittorrent devs.
you are right Michalng thank you.
hust tried on edge, and its ok with qbittorrent / dietpi
still cant login on chrome.
Ref: https://github.com/MichaIng/DietPi/issues/2861
No issue on Buster systems, so it is resolved with current qBitTorrent versions. Will report this to the Debian bug tracker, perhaps it is reason enough to update the version in Stretch repo. Otherwise we probably need to ship custom compiled binaries.
I will add the info to our online docs for now: https://dietpi.com/forum/t/dietpi-software-details-for-all-installation-options/22/68
I installed qbittorrent today and tried to login with Chrome, Edge and Firefox all give a warning āusername and/or password incorrectā after sometime my ip get banned. I used
admin - adminadmin,
qbittorrent - dietpi,
qbittorrent - adminadmin,
qbittorrent - myglobalpassword
and also tried root as username
nothing worked for me.
I have the same issue with a fresh installā¦
With me also the same problem.
I changed the password under qbittorrent / .config
But no success no registration possible.
wellā¦ In my installation there was no configuration file, and the login didnāt work.
So Iāve taken the following steps to make it work:
1.- Connect by SSH to your device.
2.- Execute:
qbittorrent-nox default
The default user name and password will now appear, and the service will be running on port 8080. Access to your IP:8080, with the credentials that qbitorrent has indicated, login and change the password from the configuration.
Now you can kill the qbitorrent-nox service (Ctrl+C) and restart the device services:
dietpi-services restart
Now you can access to the service with:
user: qbittorrent
passwd: YOURPASSWORD
I hope Iāve explained wellā¦ 
Thanks for your reports guys. I will try to replicate. Probably the way the password has to be stored changed.
issue fixed below
The config file did not exist? That is strange since it is explicitly created 
:
/home/qbittorrent/.config/qBittorrent/qBittorrent.conf
Iāll retest a fresh install later, currently I canāt see a reason why this fails, besides the mentioned Chromium login issue on Stretch systems.
qbittorrent-nox default
Note that this must be executed as user qbittorrent, which is what the service runs as, so:
sudo -u qbittorrent qbittorrent-nox default should be it, if the above file indeed was not created as expected.
Figured this out, in case anyone is still having issues here:
The systemd file is
/etc/systemd/system/qbittorrent.service
which is, by default
[Unit]
Description=qBittorrent (DietPi)
After=network.target
[Service]
User=qbittorrent
Group=dietpi
RemainAfterExit=yes
ExecStart=/usr/bin/qbittorrent-nox --webui-port=8080
[Install]
WantedBy=multi-user.target
So the service is run as qbittorrent user by default, so the relevant prefs file is in
/home/qbittorrent/.config/qBittorrent/
so just hit up a quick
cp -r ~/.config/qBittorrent/ /home/qbittorrent/.config
Hey guys, I found the bug. We used useradd -p ā$GLOBAL_PWā to create the user, but this takes the password not as ārawā but as encrypted. So when login fails, please do:
chpasswd <<< 'qbittorrent:yourPassword'
echo -n 'yourPassword' | md5sum | mawk '{print $1}' # Copy this string (hashed password)
nano /home/qbittorrent/.config/qBittorrent/qBittorrent.conf
Add the hashed password here:
WebUI\Password_ha1=@ByteArray(yourHashedPassword)
Thanks! Just installed the latest today and this is still an issue, after reading all the other threads I found this suggestion. It was the only thing that worked to let me in though the webui. Much appreciated! 
Iāve been fighting with this problem for a while now and finally yesterday after inspect the qBittorrent.conf on my home folder and the qBittorrent home folder i figure out that every time I restarted the service the password was resent to mygobalpassword 
Damnit!
So for me the username was: qbittorrent
and the password: myglobalpassword
Now I can log in normally.
Hi!
Iām having the same problems now with the latest Bullseye release and Qbittorrent (just did a clean install). Iām using qbittorrent as user name and myglobalpassword as password, but Iām getting Invalid Username or Password.
Can anyone else confirm this issue?
Hereās the log for the installation:
Mode: Configuring qBittorrent: bittorrent server with web interface (c++)
[ OK ] DietPi-Software | Verifying user "qbittorrent" to run qBittorrent
[ OK ] DietPi-Software | useradd -rMN -g dietpi -d /home/qbittorrent -s /usr/sbin/nologin qbittorrent
[ OK ] DietPi-Software | Applying user password: ******
[ OK ] DietPi-Software | mkdir -p /home/qbittorrent/.config/qBittorrent /var/log/qbittorrent
[ OK ] DietPi-Software | chown -R qbittorrent: /var/log/qbittorrent
[ OK ] DietPi-Software | chown -R qbittorrent:dietpi /home/qbittorrent
[ OK ] DietPi-Software | systemctl daemon-reload
looks like using qbittorrent version ā„ 4.2.0, authentication method changed. Something we need to have a look into.
As workaround, you could do following
systemctl stop qbittorrent.service
nano /home/qbittorrent/.config/qBittorrent/qBittorrent.conf
Once you are in the file, delete the entire line starting WebUI\Password_ha1. Should be somewhere at the bottom.
Restart the service afterwards
systemctl start qbittorrent.service
Default password would be adminadmin. Donāt forget to change once you are login.
That workaround was great. Working now!
Bumping this topic as this issue remains present in dietpi Ver 9.1.1. Debian 12.5.
Just adding something to complement @Joulinar workaroundā¦
Configuration file includes the line:
WebUI\Username=qbittorrent
So login with this user (dietpi modification) and not using āadminā user to login, as qbittorrent documentation states.
Regards, Francisco.