Grafana "Network Error: Bad request(400)


I have this message because I have almost 40 VM per graphic, if I delete a few, the problem disappears.

I already had this problem (virtual machine limit), but the error was Network error: request-URI too long (414).

And to fix it, I add LimitRequestLine 99999 on etc / httpd / conf / httpd.conf

Do you have any suggestions?

Thank you.