PHP Error with amp compatibility

Hi there,
I’m getting this error every couple of seconds in my debug.log file. Can anyone help me with how to fix it?

PHP Notice amp_is_available was called incorrectly.amp_is_available()(oramp_is_request(), formerlyis_amp_endpoint()) was called too early and so it will not work properly. WordPress is currently doing theshutdownhook. Calling this function before thewpaction means it will not have access toWP_Queryand the queried object to determine if it is an AMP response, thus neither theamp_skip_post()filter nor the AMP enabled toggle will be considered. It appears the plugin with slugwebp-expressis responsible; please contact the author. Pl