Hello,
I checked your site and I see that the plugin is using Bing search for search results scraping. This method can not be reliable, as Bing can block access to their site, because they don’t allow their results to be scraped.
However, the plugin supports also alternatives methods for search engine results importing, as SerpAPI and ValueSerp.
To switch to using these services, please add an API key for either of these services, in the plugin’s ‘Main Settings’ menu -> ‘API Keys’ tab -> ‘SerpAPI API Key’ or ‘ValueSERP API Key’.
ValueSERP is cheaper than SerpAPI, so I can recommend using it. Tutorial video of it: https://www.youtube.com/watch?v=Rz3nr7rnqKg
Let me know if this helped.
Regards.