Overview

Steps to Reproduce

1. start KeePassXC
2. start Firefox or Chromium with KeePassXC-Browser (associated in KeePassXC)
3. try to get a password from the database

Expected Behavior

All should work as in installation from Debian repository
Versiion 2.5.4+dfsg.1-1~bpo10+1

Actual Behavior

Error from KeePassXC-Browser in web browser

KeePassXC-Browser has encountered an error:
Message encryption failed. Is KeePassXC running?

After pushing Reload Button

KeePassXC-Browser has encountered an error:
Key exchange was not successful.

Context

All is fine if I use KeepassXC from Debian repository
Versiion 2.5.4+dfsg.1-1~bpo10+1

KeePassXC - Version 2.6.4
Revision: 34a78f0
Distribution: AppImage
KeePassXC-Browser - Version 1.7.6

Operating System: Debian 10 GNU/Linux
Desktop Env: Gnome
Windowing System: X11