I have problem with registrations in subdirectories. in my main domain it works fine but if you register in my main/sub you do not recive a mail.In sub/options banned names " Warning: invalid arguments passed in /.../wp-admin/ms-options.php in line 150.
I removed ms-optinons.php and coppied a new one but it is same again.
Wath is the problem ? How can I fix it?