Problems after downloading new version r424.2

Hi,

I'm having problems with opening the c3 preview (F5), after updating my c3 to r424.2.

Note it only happened after updating it, previously in the day it was fine.also connection is good here and no browser problems.And I tryed opening it on edge same result.

Also i refreshed my page numerous times-same result.

Even restarting my PC.

here's a ss:

Hope you can fix it.

Radkampfwagen