dietpi-explorer and hdd problem

Hello

I have a problem recently when I use dietpi-explorer.
I can not get into my external hard drive anymore. Instead this line of error appears.

/ DietPi / dietpi / dietpi-explorer: line 273: $ item: ambiguous redirect

Where the problem comes from and how to solve it.

Cédric79
Many thanks for your report. Can you please paste: ls -Al /mnt/