I think, that the issue is that the site can be accessed via “http” and “https” protocols as well. If you try the search on both versions:
HTTPS: https://recovendor.com/
HTTP: http://recovendor.com/
Then it won’t work on the “http” version, because the server has a CORS policy to not allow some requests via the “HTTP” protocol to the secure version. The easiest solution would be to force everything to redirect to the “https” version. If you are using Cloudflare, you can set that up somewhere in the options.
There are also plugins for that, I think this article covers most possibilities.
Enabled “Use the custom ajax handler?” option on compatibility tab and it seems to work fine now.
Earlier I used to get the error message after every 2, 3 searches. Now it looks fine.