I have custom resource configured (slack notification), which seems to be configured properly. It was also working fine. For past few builds, it actually stopped to work (no workers satisfying: resource type 'slack-notify') without me touching anything (I'm the only one with access to that installation). I re-checked configuration and restarted beacon, no success.

Interestlingly, it sometimes work half-way: 'put' works fine (and slack message is sent), but 'get' which automatically follows that says:

no workers satisfying: resource type 'slack-notify'

available workers: 
  - platform 'linux'