This error indicates a module, usually a third party module, doesn't have a text key defined properly in xxModuleConfig.php.

Suppressing warnings, notices, and deprecated warnings must be done in:

/path_root_site/inc/ in header.inc.php

Find the line about error reporting and change to:

error_reporting(E_ERROR | E_PARSE);

IMHO this should be done on ALL production sites.

It doesn't matter what your php settings are, UNA defines its own in the above file. 😊