404 error for result page

Hello and thank you for this really useful plugin!

I have been having a problem since yesterday if I trust my GCSE statistics reports. There are no search pages edited since yesterday, while my site usually has over 5,000 a day. When we do a search, we get a 404 error. I checked in the search engine settings , it works fine. I’m not sure if it’s coming from the plugin, and I’ve read old support requests on the same subject, but I can’t find a solution (I cleared the cache, I tried several browsers, devices, with the same problem). Do you have any leads?

PS: everything is up to date.

The page I need help with: [log in to see the link]

 

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