403 when updating env variables

I'm trying to add env variables to a workers project through the dashboard and getting a 403 error

API Request Failed: POST /api/v4/accounts/.../workers/scripts/.../versions (403)

API Request Failed: POST /api/v4/accounts/.../workers/scripts/.../versions (403)

API Request Failed: POST /api/v4/accounts/.../workers/scripts/.../versions (403)

API Request Failed: POST /api/v4/accounts/.../workers/scripts/.../versions (403)