app.activeDocument.path returns error 8103

[Radiant_smarts157F]

macos 12.2.1 (21D62)

Photoshop 23.0.2

I have a script that is based on "Export Layer Comps to Files". Basicaly, it sets the directory to save to (to a sibling directory of the PSD file, e.g., project/src/file.psd -> project/fig/file-layercomp.png).

This has worked very well up till yesterday.

Today I'm getting error 8103 when getting the path name. 

  alert("name of active document: " + app.activeDocument.name); // OK 
  alert("path of active document: " + app.activeDocument.path); // ERROR 8103

The file exists on disc, it is saved and photoshop has full access to that disc.

Any clue what might be wrong?

[Radiant_smarts157F · Accepted solution]

The problem no longer occurs after restarting the mac.

I hate it when that happens! But, case closed.