Hi there,
The 406 Not Acceptable status code is an error message that means your website or web application does not support the client's request with a particular protocol. Basically, this includes everything from an unsupported protocol to a bad user agent (think Internet Explorer) and more.
Execessive crawling can also lead to this error like semrush, ahref..you need to slow down a bit and mange the crawl limit..
I see your website loading fine,...