Rated 5 out of 5 stars

Works again as intended.

Rated 2 out of 5 stars

I was not able to reply to the reply to my last post, so:
In the "Signal Spam extension settings" all checkboxes green - does not work.
Disabled "Report in one click" - it works. The report is in the history.

This review is for a previous version of the add-on (4.0.4). 

OK, we'll check that.
You can still join us at [email protected]

Checked... everything works fine on our side.
I can't see any reason why it would not in your case.
I guess you checked the extension is up to date?
On what Operating System are you running?

Rated 2 out of 5 stars

Thunderbird 78.5.0 64-bit
When I click the toolbar button on a spam mail I get this response:
https://i.imgur.com/PIRwBBY.png
The credentials are correct, I can login with them on the website https://signalants.signal-spam.fr/login
Checking for the history at https://signalants.signal-spam.fr/reportings I see that no report was transmitted since Nov 5, 2020.

This review is for a previous version of the add-on (4.0.4). 

And what is displayed in the extension settings (options) page?
Credentials are correct there also?