Coding error detected, it must be fixed by a programmer: Cache definition core/string requires simple keys. Invalid key provided.

More information about this error

Debug info: en_mod_local/hub_1403244701

Error code: codingerror

Stack trace:

    line 538 of /cache/classes/helper.php: coding_exception thrown

    line 852 of /cache/classes/loaders.php: call to cache_helper::hash_key()

    line 282 of /cache/classes/loaders.php: call to cache->parse_key()

    line 1454 of /cache/classes/loaders.php: call to cache->get()

    line 118 of /lib/classes/string_manager_standard.php: call to cache_application->get()

    line 267 of /lib/classes/string_manager_standard.php: call to core_string_manager_standard->load_component_strings()

    line 6896 of /lib/moodlelib.php: call to core_string_manager_standard->get_string()

    line 259 of /message/renderer.php: call to get_string()

    line 170 of /message/edit.php: call to core_message_renderer->manage_messagingoptions()

Output buffer: <div class="notifytiny debuggingmessage" data-rel="debugging">The module name you passed to get_string is the deprecated format like mod/mymod or block/myblock. The correct form looks like mymod, or block_myblock.<ul style="text-align: left" data-rel="backtrace"><li>line 6873 of /lib/moodlelib.php: call to debugging()</li><li>line 259 of /message/renderer.php: call to get_string()</li><li>line 170 of /message/edit.php: call to core_message_renderer->manage_messagingoptions()</li></ul></div>