On Nov 28, Heroku removed the free dyno type and rename Hobby to Basic.
According to the Heroku team, Hobby and Basic were supposed to be interchangeable, but it seems like they are not and so users who changed their app's dyno formation from Hobby to Basic started to get the error "Request type Hobby is not available, please use Basic".
Once we realized that this error is being raised, we executed a maintenance task (that we've prepared to run later on) to rename Hobby to Basic within Cron To Go. After the change was complete, we noticed an increase in "Request type Basic is not available, please use Hobby" - for users who haven't changed their app's dyno type to Basic.
For the time being, we reverted the change from Hobby to Basic apps with Hobby dyno formation. We added support for both Hobby and Basic dyno types in the dyno size selection. If you change your app's dyno type from Hobby to Basic, make sure to change your Cron To Go jobs' dyno type to Basic as well.