I was using those avatars before, now I can’t. What “Security checks failed” even means?
This means that you exceed the criteria, such as a download size of more than 200MB or 500MB uncompressed.
Other issues that lead to security checks should basically not have happened recently, but much earlier, and the conditions are usually not easily triggered.
For example, tens of thousands of bone, skinmesh, Mesh, etc. or tens of thousands of empty objects, etc.
You can tell that this is outrageous just by looking at the values.