Joshua-M Thanks Joshua. I am on a Mac and it happens in all browsers. Safari, Firefox, Chrome, etc.
The strange thing is it will be fine for a while (probably when you checked it, it was fine) and then it will just stop working and I will get the error message in Chrome developer tools.
If I do any work on my site, it usually corrects the problem for a while. It is very strange.
Is there a memory, or cache or something else problem I can look at? It has literally been plaguing me for months and I am now at the end of my deadline and I really need to figure this out.
Thanks.