Could you please restore the staging version of the website? Please deactivate all plugins, except for WPML. From my side, deactivating plugins has led to a critical error which I can't fix, since I don't have FTP access.
Just to give you some context, when debugging issues like the one you are having, we seek to analyze the error in an isolated environment. In your case, it's probable that the error is related to your theme, so we need to have only your theme and WPML installed. I haven't managed to achieve that yet because:
1. The Back End is partially glitchy (the interface is broken and has missing or non-functional features);
2. Deactivating the plugins in staging leads to a critical error;
3. Activating the child theme locally leads to a critical error;
4. Issue is not reproducible in Sandbox;
5. We don't have FTP access;
I apologize for the back and forth, but I really need to have a more isolated version of the issue, so our developers can analyze it more efficiently. I'll wait for your feedback.
Thank you for sharing. With the restored version you sent, I was able to update the menus as expected, see video:
hidden link (The video is unlisted and only people with this link can watch it)
Please send me a version of your website, where the problem can be reproduced. Also send me a version where we can install other themes and plugins, as it is necessary for our debugging process.
Thank you, now I was able to finally escalate your issue. Our development team will look for a permanent solution to your issue, what usually takes a few days. As soon as I have feedback from them, I'll let you know.
Our development team has thoroughly reviewed the situation and concluded that a Duplicator copy of your site is essential for progressing towards a resolution. This copy will enable us to replicate the exact environment where the issue occurs, which is key for an accurate analysis and effective solution.
I understand your previous concerns regarding sharing a Duplicator copy, and I want to assure you that the security and integrity of your data are of utmost importance to us. However, without this copy, we are significantly limited in our ability to diagnose and fix the problem effectively. If you can't send us the copy, I can install the Duplicator plugin directly on the staging version of your site to create the necessary copy. I'd just need you to give my user the privileges (as of right now, the user you sent me isn't allowed to install plugins).
Your cooperation in providing this critical information is greatly appreciated. Our team is committed to resolving this issue promptly and efficiently, and having access to a Duplicator copy is a step we cannot bypass. Please let me know your preferred method for proceeding with this request, and I will make the necessary arrangements immediately.
Hi. We see that Duplicator Pro is required for networks. Do you have a copy of this that can be installed?
Also, we have concerns about it including automation, because that is symlinked into each or our networks. And if it doesn’t include automation, the theme will error as discussed previously..