betty2happy

I finally found out why it stopped loading in my case ??
I remembered changing the Settings/Permalinks from https://mysite.com/post-name to Custom Structure where I added %category% before %postname%

Even though the site is live and I have already activated Yoast, I changed it back and instantly I could open my custom Single Page EN!

Yes, latest version of Elementor Pro
I found a workaround, but it does not work for Single Posts for my second language.

After I created Header (Default lang) assigned to entire site
I clicked the + and created the Header (second lang) no assignment

By going to the second lang via the flags, I was able to access the header (and custom footer done the same way) from within ‘Edit with Elementor’ and click the yellow ‘Header’ and or ‘footer’ for the translations BUT NOT by clicking the drop down to Edit the custom Header EN or Footer EN

As I said, this has worked perfectly, until now that I am ready to edit the Custom Single Post Template for the Second Language (Single Post EN)
I can not access it from the front from ‘Edit with Elementor’
If I try the link created when I clicked the + it gives me white page with the elementor stuck on loading
If I try to click the drop down Edit Single Post EN (from the front) same thing

The fact that it drops down the correct custom Template on each site I am on, shows that the Plugin is working, and the setup is correct.
It is just not loading from the Saved Templates, nor from the drop down.