Hi guys,
I have this problem after uninstalling ver 10 and installing ver 11, please help me how to fix it. Thanks.
Try to do full Corona uninstall including all the Chaos services from add/remove programs window and then do clean install. Maybe that will fix the issue.
I did this method and the manual method as well, but this message still appears.
Please try carefully following these steps one by one:
Solved , TnQ
Great, can you let us know which exact step helped? 
Interesting, thank you. So most likely there was some leftover in the 3ds Max installation folders which had to be manually removed.
Thank you for your fast response.