Problems with refreshing authentication token?

[pizzonia]

Describe the problem and steps to reproduce it:

On thunderbird 115.15.0 (64-bit) under Linux No sync. No load of available calendars. From debug log on error console it seems that this occurs when refreshing the authentication token.

What happened?

The provider for google calendar does not sync subscribed calendars. Thunderbird activity manager shows a stuck activity for each non-syncing calendar. Even subscription of calendar does not work. The dialog never-ends loading the available calendars and just the "waiting icon" is shown indefinitely.
Thunderbird activitiy manager does not show anything during the never-ending load of available calendars.

When trying to close thunderbird a process remains pending for a while (windows closes though), then crashes.

Error console does not seem to show any related error.

What did you expect to happen?

Correct sync and load of available calendars.

Anything else we should know?

Yesterday it still worked. Google account seems regularly accessible from web. I did not changed any configuration. Does anyone experience any similar problem?

Somewhat relevant messages from error console follows (with debug log activated).

12:46:49.350 Calendar: [calGoogleSessionManager] Creating session [email protected] gdataSession.jsm:99 12:46:49.352 Calendar: [calGoogleSession] Token expired 1726656410 seconds ago, resetting gdataSession.jsm:408 12:46:49.353 Calendar: [calGoogleCalendar] Logging in session [email protected] gdataSession.jsm:283 12:46:49.353 Calendar: [calGoogleCalendar] No access token for [email protected], refreshing token gdataSession.jsm:367 12:46:49.353 Calendar: [calGoogleSession] Adding item https://www.googleapis.com/tasks/v1/users/@me/lists to queue gdataSession.jsm:427 12:46:49.353 Calendar: [calGoogleSession] Adding item https://www.googleapis.com/calendar/v3/users/me/calendarList to queue gdataSession.jsm:427

​