cannot post. not able to write on post content

cannot click on post body to start typing a new post

What is it doing? Freezing? Any error message?

– Flushing any caching plugins you might be running, as well as server and/or browser caches. Also, any op cache or content network cache, as well as Cloudflare, clear those caches.
– deactivating ALL (yes all) plugins temporarily to see if this resolves the problem (plugin functions can interfere). If this works, re-activate them individually (one-by-one) to find the problematic plugin(s).
– switching to the unedited default Twenty Fifteen theme for a moment using the WP dashboard to rule out any theme-specific issue (theme functions can interfere like plugins).
– Using your browser to identify JavaScript issues or conflicts. Do you have any Javascript errors in the console when looking at the editor page? – This article can assist you in doing that diagnosis

@tadser,

I don’t know what these errors means.

You may want to discuss with your host.

If you still need assistance, as per the Forum Welcome, please post your own topic. That way you stand a good chance of getting full attention to your specific issue. Despite any similarity in symptoms, your issue is likely to be completely different because of possible differences in physical servers, accounts, hosts, plugins, theme, configurations, etc. Thus one problem, on one setup is not indicative of the functionality and reliability of an application as a whole.