406 error

[bex280x1]

Some (but not all) of my pages (php) are throwing a 406 error:

"An appropriate representation of the requested resource /namedmethods.php could not be found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request."

How do I fix this? The same pages used to load no problem.

Thanks

 

[bex280x1]

Any ideas anyone? I've seen other posts on here about 406's, but I'm not convinced this is the same issue. Help please!!!