SychO there was a footer image, error message "Something went wrong while trying to load the full version of this site. Try hard-refreshing this page to fix the error." and a list of last discussion. No sidenav, no user menu, no access to admin board. All browsers tested with the same result.
I have logged to console, removed Asirem theme - the forum starts to work. I installed Asirem, enabled it in admin board - forum becomes inaccessible again.
