Error when trying to view node or process model properties

Hi 

I am currently having an issue when i try to view the process model properties or the process node properties. i cant see anything except for what is shown in the screenshots above. 

This only occurs on the DEV environment. On INT and QA i have no issues and if i log on with the administrator in DEV then it works correctly. 

I have tried clearing my browser cache, we have restarted the DEV box as well and that doesnt seem to help. 

Has anyone faced this issue or knows how to solve this?

Kind Regards

Preshen