API Key / Token for Workers not working

I’m trying to using Serverless.com to deploy Cloudflare Workers and am encountering the same problem as described here:

The only way to solve it was to use the Global API Key (as mentioned in the above thread).

Is this still a known issue?

FYI, API Token permissions:

Account: Workers KV Storage:Edit, Workers Scripts:Edit, Account Settings:Read
Zone/Domain: Workers Routes:Edit
Users: User Details:Read