Is it me ? or Windows 10 ? or Firefox ?

[T J]

Check your Internet connection and try again.

many times today....

or is it this wonderful site ?

[Brian Kling]

We are investigating, this has appeared 4-5 times since last week.

[T J]

I fixed it my end but it proves your website does not track browser sessions, but users...

if you have multiple browser sessions on st.com, it falls over easily.