We've had a sudden problem develop with our access to the API on our premium cloud setup. In prototype code which has been working for the last few weeks, we're suddenly getting 401 responses. Having stepped through, we're being issued a valid bearer token; it's calls to anything under /act.web.api/api/ which thow the 401. Oddly, swagger appears unaffected and we can prompt valid responses through it.
We approached support, but were directed here. Does anyone have any ideas for how we could remediate this?