AE: Brush tool doesn't get exported

I’m trying to make a frame by frame animation and export it to a lottie animation. But i cannot get the brush strokes to get exported, I have tried exporting brush strokesover a solid and over an image. But when I export the brush strokes are gone. I’ve tried to export with different animated shapes and that works fine. Does anyone know how to fix this? (I’m using Bodymovin to export)

Thanks for any help:))

Can you convert the brush strokes to shape layers? Those brush effects wont export.