I use Xubuntu 20.04, Texstudio with Texlive.
I want to load and install new package with tlmgr in graphical user mode. When i push the button "load deposit by default", the window cut off and i can read in a terminal window :
/usr/bin/tlmgr: unexpected return value from verify_checksum: -5
Same answer with the command tlmgr udate -all
How to fix it ? Thanks for your help.