Yes, same goes for me with Ubuntu Mate, see here and following Threads: https://lists.x2go.org/pipermail/x2go-user/2019-October/005725.html

Am So., 13. Okt. 2019 um 15:38 Uhr schrieb D Ducky <suffsuccotash@gmail.com>:

In Fedora 30, I don't even seem to have this package, but still have the
issue.

On 10/12/19 3:44 PM, Ulrich Sibiller wrote:
> On Sat, Oct 12, 2019 at 5:28 PM Alexanderstr Miete
> <alexstrbonn@gmail.com> wrote:
>> Help would be much appreciated. How can Seahorse get the same privileges during that X2Go session as for a local session/VNC?
> Hmm, have you tried this?
> https://askubuntu.com/questions/931780/passwords-missing-from-seahorse-passwords-and-keys
>
> Uli
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