[TYPO3-english] Typo 3 4.7.12 -Error log help

[Brian Jensen]

Hi everyone,

 I recently updated our typo3 site to direct to 404 pages. 

I have a Typo3 ( 4.7.12) installation with multiple domains ( and languages) and I've created 404 pages under each domain.
and set [FE][pageNotFound_handling] = /404/ in the config area.


Now the Log display errors every second:

Core: Error handler (BE): PHP Warning: Illegal string offset 'translations' in /var/www/websites/oursite/typo3_src-4.7.12/typo3/class.db_list_extra.inc line 1521

and 

Core: Error handler (FE): PHP Warning: Illegal string offset 'data' in /var/www/websites/arp/typo3conf/ext/templavoila/pi1/class.tx_templavoila_pi1.php line 275

Are those errors because of my 404 pages or is the problem to be found elsewhere?

Is there anything else I should be aware of?



Hope one of  you can help me  :) 
Thank you so much!