“Client browser does not accept the MIME type of the requested page.”

Hi. We are the very happy owner of your theme. Everything was running smooth so far, but, we have two articles that gives error when we try to modify and update them :

https://testeurdecbd.fr/semences-et-graines-cbd/
https://testeurdecbd.fr/cannabis-et-medecine-rapports-etudes-recherches/

Error : Not Acceptable
Client browser does not accept the MIME type of the requested page.

This happen only on those two articles, and :
We disable Tag div plugins and even re installed them, didn’t work
We disable Wp Cache And Jet back boost, but didn’t changed
We tried by modifying HT access as some online helps post suggest, but crahed the website

If you have any idea or help, we would be very grateful ! 🙂
All best

did you test pages with gtmetrix, securi and also console mode in chrome for errors?