Err_Spdy_Protocol_Error Chrome On Win 10

We are getting some customers reporting seeing this error when paying via Credit Card.

At the "Pace Order" button press the next page shows:

This site can’t be reached
The webpage at be temporarily down or it may have moved permanently to a new web address.

Customers are using Chrome on Windows 10... Yeah.. I know... what a compination for disaster, but regardless... has anyone else seen this?

some info here:


and according to the last poster reckons that its only fixable from the web server end. Seems to occur when using Sessions to store and pass data.

I'm receiving this error when making updates to orders or products on the backend. Using Chrome on Windows 7 with Avast

Hmm, I thought it was a chrome+win10 thing, maybe its just a chrome thing?

which version of CSCart?

Did you solve it?