Can't switch Premium to all after stripe setup

Be able to give everyone premium again.

Setup stripe and try to give everyone premium

Canary Web 2026.1010.150331, Linux (x64), Firefox 157.0, Locale en-US

api-1 | {"level":"info","time":"2026-10-10T18:39:47.265Z","service":"fluxer-api","env":"production","method":"PATCH","path":"/admin/instance/config","status":400,"durationMs":13,"msg":"Request completed"}