[gthumb-list] Help with linking flickr and facebook accounts in gthumb

[Ridolfi Simone <amicolinux linuxmail org>]

Hi everyone, my name is Simone and I am a computer enthusiast.
i installed linux mint 20 (based on ubuntu 20.04) on a pc, one of the
programs i installed is gthumb which i was going to use to post pictures
on my flickr and facebook accounts

When gthumb shows me the screens with which you should confirm the data
to link gthumb to the accounts in question it gives me an error and does
not connect the accounts in question to be able to post

how can this problem be solved?

Thanks for everything