[SOLVED] CheckingProcessor error problem

[roadhog]

My templates stop working in the middle because of this annoying popup. It is making zennoposter useless at this point. It started after I upgraded to 4.3

Here is a screenshot. http://screencast.com/t/38ldEEJiK

 

[rostonix]

What OS?
What frameworks are installed?
If it happens often try to disable antivirus/firewall and test again.