My thinking is that my reverse proxy isn't forwarding all the headers necessary for reaction-file-collections to process the upload. But after trying for hours I still can't get it to work so I'm thinking it might be something else.
I suspect the culprit is Nginx because uploads work fine when accessing the app directly
Yet another question—anybody knows if there's a way to re-send a merchant sign-up invitation email? Hitting the re-send button in the email panel obviously re-sends the email with the same token (that might be expired). Inviting a merchant a second time from the Invite Owner Form fails with the following message: "This user already has a shop. Each user may only have one shop."