Also, I noticed that your “WP Memory Limit” PHP limit is below the required 128MB or recommended 256MB as described at: https://wpml.org/home/minimum-requirements/ . Could you please contact your hosting provider and ask them to increase this PHP value for you and also, ask them to update the MySQL version to 5.6+?
Please briefly explain what you've done and if possible, share some screenshots. I would need to take a closer look at your site. So I would need to request temporary access (WP-Admin and FTP) preferably to a test site where the problem has been replicated if possible in order to be of better help and check if some configurations might need to be changed.
IMPORTANT: Please, note, a backup is required for security reasons, and to avoid any data loss, you can use the https://wordpress.org/plugins/updraftplus/ plugin for these backup needs.
Your following answer will be private, which means only you and I have access to it.
✙ I would need your permission to de-activate and re-activate Plugins and the Theme and to change configurations on the site if required. This is also a reason the backup is critical.
I've checked your Website and may I know why are you translating the "Custom Field" names? When I checked your translated portfolio here hidden link , it looks fine. Are you trying to translate these words as shown in the attached screenshot?
If not, please highlight it using a screenshot of what you're having difficulties trying to translate and I'll do my best to assist you further with this.