Rated 4 out of 5 stars

Hello,
I used this add-on for a long time and really appreciated it.
Recently, I encountered an issue related to cookies. When starting Thunderbird, Google log in is requested, then a pop up window tells (translated from French language) : small issue - seems that cookies have been deactivated within your browser. Either check whether they are activated or try to open a new page in your browser"
Whatever I did within Firefox did not change anything in TB. I could display my Google calendar within Firefox without any difficulty.
As suggested by sneppa, I tried to remove completely Lightning and Provider for Google calendar, then reset up latest releases, but it didn't improve.
Am I alone in this case ? Any suggestion on the way to fix it ?
Thanks in advance for any advise.

This review is for a previous version of the add-on (1.0.2).