This is not a fatal error but is a big deal for anyone upgrading a forum with the plugins menu hidden (such as with WPMU and Plugin Commander with the wp-plugins menu turned off)
Fatal errors will definately stop folks from wanting to continue, but once those errors are accounted for, there is another error that is really bothersome.
when SPF is in an “Update” mode, the Forum tab created links to:
/wp-admin/simple-forum-install
This llink goes nowhere and general shows a backend 404 error.
Thankfully there is a link in the plugins admin that goes to:
/wp-admin/admin.php?page=simple-forum/sf-loader.php
without this link, there would be no way to update or install…
This may be related to the Fatal Error in my previous thread, perhaps now is a good time to check.
https://simple-press.com/support-forum/development-discussions/fatal-error-on-activation/#forumtop