I have a problem with roundcube, the list of messages does not appear in any folder shows me the error "Server Error: SEARCH UID. UID SEARCH wrong arguments passed" but if you tell me how many message in the folder.
Solve it by modifying the file "rcube_imap.php" changed the value:
protected $ sort_field = '';
protected $ sort_field = 'date';
Just out interest does setting the default sort in the config file here https://github.com/roundcube/roundcubemail/blob/master/config/defaults.inc.php#L585 also work? That would survive updates rather than changing the core.
BTW what IMAP server are you using?
Thank you very much for your respueta, much better as you indicate.
I use the mail2world.com servers