Thank you for contacting WPML support, I'd be happy to help you with this issue.
It happens because the menu link in the second language still displays the link in the default language. For example, menu item "Bookings" in the French language: hidden link
while it should be hidden link
The minimum requirements are 128M, but we do recommend 256M and the debug information of your site shows it set to 40M. Please check this link for more details https://wpml.org/home/minimum-requirements/.
You can increase it by adding the following code in your wp-config.php file, right before the /* That’s all, stop editing! Happy publishing. */ line: