Thanks for contacting WPML forums support. I'll be glad to help you today.
1) Could you please try the following steps?
1- Make a minor edit to this page in the default language and update it. (hidden link)
2- Click on the "Spinning Arrows" icon and update the translation.
3- Repeat the above steps on this page. (hidden link)
2) It's not related to the issue, but according to your Debug.info, the WP memory limit needs to be increased. PHP memory is fine, but WordPress uses 40Mb as default. Minimum requirements for WPML are 128Mb. (Kindly check this page 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: