[Bug]: Nextcloud 3.15.x not usable on Linux Mint

[stefan-franz]

⚠️ Before submitting, please verify the following: ⚠️

• This is a bug, not a question or a configuration issue.
• This issue is not already reported on Github (I've searched it).
• Nextcloud Server and Desktop Client are up to date. See Server Maintenance and Release Schedule and Desktop Releases for supported versions.
• I agree to follow Nextcloud's Code of Conduct

Bug description

The Nextcloud Desktop App in v. 3.15.x (0,1,2) is not usable on Linux Mint. Neither the flatpak nor the appimage version.

1. It freezes it self
2. It synchronizes all the time time despite nothing has changed

And it seems no one does make a fix repair. The error is on all devices. Linux Mint 21.3 and 22.0
I had to go to 3.13.4 on Linux Mint 22 and 3.14.3 on Linux Mint 21.

Please make a fix for it. Really not usable.
...

Steps to reproduce

1. Right click on the file
2. Click on Share Options
3. The share dialog does not display the option to share by e-mail
   ...

Expected behavior

Working stable.
...

Which files are affected by this bug

hmmm

Operating system

Linux

Which version of the operating system you are running.

Linux Mint 22 and Linux Mint 21.3

Package

Official Linux AppImage

Nextcloud Server version

29.0.9

Nextcloud Desktop Client version

3.15.2

Is this bug present after an update or on a fresh install?

Updated to a major version (ex. 3.3.6 to 3.4.0)

Are you using the Nextcloud Server Encryption module?

Encryption is Enabled

Are you using an external user-backend?

• Default internal user-backend
• LDAP/ Active Directory
• SSO - SAML
• Other

Nextcloud Server logs

Additional info

No response