Trigger Failed With Error " Undefined Robots #1678"

Folder Default: #trigger [TriggerName] for #process [ProcessName] could not start. Undefined Robots (#1678)

Root Cause: There could be different reasons for such error - undefined robots(#1678),

  • When trigger runs the Job and it failed unexpectedly due to exception not handled properly and the activity timeout issue causes such alert error message.
  • when Robots in classic folder is connected to Robot machine but no environment is selected for the Robots created such errors. Attached screenshot for example,

Read more on the UiPath Forum post - Error Schedule For Process Could Not Be Started Undefined Robot .