Nextcloud app doesn't work

hello I installed nextcloud on my macOS Catalina 10.15.7.
The installation goes well but when I try to launch nextcloud in my app menu, nothing happen… no error pop up or message… just nothing. I don’t know what to do.

I already uninstall and reinstall the app four time and it always goes the same.

this is issue is revolved.
see : macOS / application nextcloud ne s'ouvre pas - #12 by Nours