Users are reporting an error when logging in using the bbPres login widget:
Warning: require_once(/home/sitename/public_html/wp-content/plugins/bbpress/includes/admin/converters/example.php) [function.require-once]: failed to open stream: No such file or directory in /home/sitename/public_html/wp-content/plugins/bbpress/includes/users/functions.php on line 1705

Fatal error: require_once() [function.require]: Failed opening required ‘/home/sitename/public_html/wp-content/plugins/bbpress/includes/admin/converters/example.php’ (include_path=’.:/usr/share/php:/usr/share/pear’) in /home/sitename/public_html/wp-content/plugins/bbpress/includes/users/functions.php on line 1705

I noticed that the filename is different in the referenced location, it has a capital letter in Example.php When I change the filename it resolves the issue.

Why does it need to reference the Example.php converter anyway?

[@robkk Moderator 9 years, 9 months ago]

this is a weird issue , could a conflicting plugin or a messed up install, follow this if it helps any

General Issues
bbPress works with many themes and plugins, but it is impossible to test all combinations, and many issues are caused by conflicts with plugins and themes.
Therefore before posting, please test if your issue is resolved by the following

Plugins

Deactivate all but bbpress and see if this fixes. If it does, re-enable one at a time to see which is causing the error.

Themes

If plugins don’t pinpoint the problem, as a test switch to a default theme such as twentytwelve, and see if this fixes.

If the above produces an issue:

If it is a paid theme or plugin, please contact the authors for resolution.
If free, do ask here, we may know of workaround.
PLEASE tell us you have done the tests above when posting.

OTHER COMMON FIXES
The following will do no harm, so are worth a try and can fix some issues
Dashboard>settings>permalinks. Don’t change anything, but just click save. This resets the permalinks, and can solve some 404 errors.
Dashboard>tools>forums>repair forums and run one at a time. Useful if you’ve got some stuff not showing – doesn’t often fix but occasionally does.