Hi @christopher.amirian!
Ok, well I have 3 backups of the site (by updraft) - you are welcome to download and install direct from the wp-admin page if that is possible? The latest backup (last night) will contain the error, and the middle backup (from 9th sept) was pre-error.
Here is my take. Trying to load the problem page in the page builder fails, and then brings down the entire site. Trying to load all other pages (almost - I’ve tried a lot but maybe not all) is fine, no errors. Also, the problem page loads fine on the client side (when the site hasn’t been crashed by the problem page from within the page builder!).
I create a template of each page when they are complete. Last night I used the ‘problem’ template on a fresh page, and it loaded fine. So there is something on that page that the page builder doesn’t like. The browser doesn’t have a problem. So it is 100% (in my opinion) nothing to do with my host, and 100% to do with the page builder. I’ve had an issue in the past similar to this, and support said it was due to unclosed tags. Unclosed tags can cause the page builder to not load correctly. I’m not saying it’s unclosed tags, but I’m aware that the page builder is very sensitive, and can be crashed by something as benign as an unclosed ‘strong’ tag. (I realise i should always close my tags!!
)
My next step is to delete the page in question, re-add it in wordpress and then re-load the template. I’ve tried so many other things - htaccess, plugins, disabling custom JS - all a waste of time, and it’s paining me that deleting the page and rebuilding (which will be instant with the template) is the solution to the 2 weeks I have lost on the site. There is something on that page that the builder can’t handle…but a browser can. This is the issue.
I’ll let you know when I’ve tried what I plan to do - feel free to download the updraft backups if you have the inclination!
UPDATE: Deleted the page, created the page again, went to sleep, woke up…problem appears to be fixed.