ethOS 1.2.7 released today, due to some pools for new coins not supporting worker names I have created a temporary fix that modifies minerprocess.php to not include worker name in the pool connection.
Please update ethOS normally to 1.2.7 using the instructions Updating ethOS, then use the following workaround to enable support for pools which do not support workername (XMR only)
sudo wget http://update.ethosdistro.com/packages/1.2.7/minerprocess.php-no-xmr-worker -O /opt/ethos/lib/minerprocess.php