Happened to me again this morning on the tablet with both Firefox and the Samsung browser.
With the Samsung browser I was able see that only one user and 30 guests were on line. I was then able to log on but there was no red numbers for unread posts. I then tried to make a post in this thread and it came up with the error.
The next step was to look at the setup for the browser: I had acceptance of cookies turned off. Turned on cookies and logged in using the private browser setting and all works fine.
Perhaps it has something to do with cookies.
PS. Now 7 registered and 60 guests so I suspect it is a fairly widespread problem.
Last edited by Gambalunga; 24/12/17 07:53 AM. Reason: PS