Rated 5 out of 5 stars

forgot the link to beta download: https://addons.thunderbird.net/de/thunderbird/addon/provider-for-google-calendar/versions/?page=1#version-68.0b6

This review is for a previous version of the add-on (68.0b6). 

Rated 5 out of 5 stars

Beta(?)-Version 68.0b6 works with new Thunderbird 68.0 (also with Thunderbird beta 69.0b4)!

This review is for a previous version of the add-on (68.0b6). 

Rated 5 out of 5 stars

I have to revise my rating: give now 5 stars.
The tip from stroehli did the trick. Javasript.enabled was set to 'false' (maybe by default or by another Add-on). I set it to 'true' now everthing works fine (Thunderbird 6.0).
For German users:
Einstellungen->Erweitert->Allgemein->Konfiguration bearbeiten...

This review is for a previous version of the add-on (4.4.1). 

Rated 1 out of 5 stars

Do not work anymore!
After updating Thunderbird to 60.0 provider babbles something like '... JavaScript is deactivated in your Browser...' which is definitly not the case. By the way: what Browser? I've installed three: Firefox, Google Chrome and Edge, where Firefox is default.

Following the full error message in german:
"Ihnen wird diese Seite angezeigt, weil wir festgestellt haben, dass JavaScript in Ihrem Browser deaktiviert ist. Die Seite, die Sie laden möchten, kann nicht richtig angezeigt werden, wenn Skripts deaktiviert sind.
Aktivieren Sie die Skripts und wiederholen Sie den Vorgang oder gehen Sie in Ihrem Browser zurück."

Please fix it!

This review is for a previous version of the add-on (4.4.1).