"Error: CDO for class ...not load" when referencing a Blueprint of a custom plugin

Hi,

Hope you’re doing well!

Try to set your plugin’s LoadingPhase as PreDefault, in your <your_plugin>.uplugin, e.g.:

"Modules": [
  {
    "Name": "MyPlugin",
    "Type": "Runtime",
    "LoadingPhase": "PreDefault"
  }
]

I think this will solve your issue, if not let me know.

Hope that helps - take care.