Thanks for your response
I was using the Fordson theme, but the same problem arises with Boost.
This site has been badly managed, and has over 50 plugins, some of them outdated. I am eliminating them one by one...
But I ithink the major problem is the cache management.
I have included screen captures of the plugin configuration for the caches. This site in in French
The item "Cache stores s" is in boldface, which indicates a problem, I think.
Caching
The configuration of the caches seems OK, but I don't know much about this.
Could this be the reason I can't change any of the site's properties (like colors, for example , or the menu on the ) or upload an image ? The third screenshot shows that the space to upload the header logo doesn't have the correct icons for upload and download and the circle within turns endlessly.
I would appreciate help with this, or in finding a programmer who can solve this problem.
Richard