The email link is missing forum after https://www.keepbritainfree.com/i.e.:
email link: https://www.keepbritainfree.com/activism/complaints-letter?postId=5f22ba79b430a90017eee462&origin=notification
should be: https://www.keepbritainfree.com/forum/activism/complaints-letter
In the meantime, if people add 'forum' after https://www.keepbritainfree.com/ it will take you to the post, intermediate solution.
I am still not able to respond to my email notifications I can get into the site but not the actual messages just says page not found
Stiil not been able to read my messages that i have received and respond to
Thank you very much for this, very helpful. We are sorting the issue, but great info for our visitors in the meantime.