Plugin no longer activates after FR translation update

Hi,
All was well until French translation update this morning. The plugin now refuses to activate even if I change the .mo file name in hope of reverting to English.
How can I make it work again? Here are the error messages.
Cheers!
L’extension n’a pas pu être activée, car elle a déclenché une erreur fatale.
Fatal error: Can’t use function return value in write context in /home.1/a/x/i/axia2/3w/www/wp-content/plugins/cleantalk-spam-protect/inc/cleantalk-admin.php on line 1924