by JimA » Mon Oct 03, 2016 9:13 am
It appears like you're running phpBB 3.0, this doesn't use extension, it uses modifications, so therefore it doesn't have an ext folder. Also, you have posted in the modification version of the ACP Add User. So you would either need to upgrade to phpBB 3.1.x or install this MOD. I'll have to say that it's recommended to upgrade to 3.1 in the near support since support for 3.0 will soon be completely dropped.