When I deactivated at least 1 of these plugins: Elementor or Royal Elementor Addons, the problem was solved. However, without those plugins, I can’t edit the page anymore because I want to use the template from Royal Elementor Addons.
What should I do to make it work even with active plugins please?
@azimwp Thank you very much for your answer.
Would you please explain the point “Switch domain and hosting” in more detail? I don’t know how to switch the new domain and hosting to show the new website.