mixamo won't import my fbx model

Hi everyone,

I've been having this issue for a while now and i looked every video and forum i could find. I'm writing down some details that could've been the problem but wasn't;

-My FBX file is only 600 kb

-It doesn't have any normal/roughness maps etc.

-My character's size is small.

-My export settings are the same as I've used always.

I didn't have any problems and could rig my character as i wanted, this error popped up suddenly and i can't use mixamo anymore, i really need to fix this issue, please help 😞 

I also tried to use different models, same error 

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