I've checked and I see you have enough memory assigned to your server. There seems not to be the issue.
Could you please try the following steps?
❌ Please backup your database before performing the above steps ❌
1- Go to WPML-> Support-> Troubleshooting
2- Run the functions one by one (Kindly check this hidden link)
3- Edit the page in the default language
4- Make a minor edit and update it
5- Update the translation
6- Check if the issue persists