Ok so I was getting the same messages and I think I have it sorted.
Go to the community folder where you have the liveries for you aircraft. Look for the specific aircraft livery which has the error message. Find that livery( Listed on the bottom part of the error message) and click on it, in the sim objects folder, right click go to properties, advanced then check Encrypt contents to secure data. then apply.
That should fix your issue. It did with me anyway.
Good luck