I have a very similar problem with Google's Chrome store. I have a small open-source extension. Recently they started to send me notices that it is in violation

I have a very similar problem with Google's Chrome store. I have a small open-source extension. Recently they started to send me notices that it is in violation of their policies. All my attempts to figure out what exactly I am doing wrong failed. I emailed multiple times. Finally, they just removed it from the store.