Okay. This problem started 2 days ago. I installed new GSX and KMEM update. Before everything was perfectly.
That doesn't help much. I'll try to explain it again: the new Addon Manager doesn't have a problem. YES, it IS different and, we found that EACH time we post an update, some users report this old error, which is a BOGUS error that happens ONLY in FSX, when a newly updated module is re-trusted, so we suspect it's a bug of the "newly-trusted" routine in FSX, which has been entirely removed in P3D, which is why nobody with P3D has ever seen this specific error.
So, it's no use saying "Before everything was perfectly", because it doesn't tell much. The only possible solution is the one I already posted above, twice.