We had problems with denied access for Staff and realized that we had activated ACL with the old IP address of the old office location. The problem was that it was not giving us access in any way. But bypassing this check in scp/staff_inc.php at row 25 commenting this code
// Enforce ACL (if applicable)
if (!Validator::check_acl('staff'))
die(__('Access Denied'));
I was able to disable ACL and now it works again correctly.
After disable it you have to uncomment again.