I have built a site with sydney. I edit it with Elementor. All is good for about 6 weeks. Then for some reason. I can no longer edit the home page via Elementor. I can still edit all other pages, just not the home page. I have disabled all the plug ins. Same. I have checked memory. Loads (256). Both Elementor support and my host say everything ok, but some errors on home page which they attribute to the theme. I have not added any scripts or changed anything manually.
This image of the error log may be helpful?