Samuel Jones

To the OP, a rogue `application/x-wine-extension-ini` file bundled in your application's ZIP file would likely be related to the hidden `desktop.ini` system file that can appear in Windows projects, but it could be any `.ini` file. Remove it/them from the ZIP and you should be good to go. Thankfully, this does not seem to still be an issue for that file type.

To aid anyone else who arrives here from a search engine, my version of this error message was:
>  Cannot create app: Attachment You are not allowed to upload video/MP2T files, allowed types: (list of types)

In this situation, it was because I had a `main.d.ts` file bundled into my application's ZIP file because the application was written in TypeScript before being compiled by the ZCLI tool. Simply removing any `.d.ts` files in the bundle made the error go away.