Hello!
We use diagram macros istalled to lib folder (without extension manager)
when create new diagram - get warning message
Warning: For security reasons, the content of the edited document is executed in restricted mode, as the edit was not initiated by a validated request. There may be unexpected errors due to this.
Hey, it seems like the free Diagram application is mostly unmaintained, outdated and has a few little bugs like this one related to CSRF. I have had issues with it too. The Diagram Pro application uses a recent version of draw.io and fixes these bugs..