"Failed to import" .sbsar file into UE5 , seems buggy and sometimes crashes

[Anthony_0_0]

Hi i’m new to this side of 3d.

When I try to use the plug in “substance 3d for unreal engine” in UE5.3.1 - UE4.27.2 to import a sbsar file, it shows this error and does not shoe the file in the folder:

And when I try to import the same file a second time in a row I get an overwrite warning for the file like it was already imported:

If I click Yes, the file appears in the folder, but it is unusable, and sometimes UE crashes.

Here are some logs:

Please help