WordPress says “The response is not a valid JSON response”
The error shows when you save in WordPress, for example a widget. Work through the causes from the top.
Common causes
1The permalinks or
.htaccess are wrongCheck
Does it happen on every page?
What to do
Open Settings › Permalinks in WordPress and click Save Changes without changing anything.
2The WordPress address doesn’t match
Check
Does the site’s address start with http while you’re on https, or the other way round?
What to do
Set the same address, with https, under Settings › General.
3A plugin is blocking the request
Check
Did it start after a new plugin?
4The server’s protection may be stopping the request
Check
Does it only happen when the page contains certain text or code?
What to do
Email support with the address and the time, and we’ll check.
Related guides
Need more help?
Email [email protected] or call 08-519 70 666.