Exception when trying to add existing person as participant to an event

[foophoof]

If I right click a Birth event and select the option to add an existing person as a participant, I get this error when I click "OK" in the window. EventAction._added_participant seems to be in this repo, so I'm reporting it here instead of in the Gramp Bug Tracker.

I'm currently using commit c206eb7.

Error Details:

20707650: ERROR: grampsapp.py: line 188: Unhandled exception
Traceback (most recent call last):
  File "C:\Program Files\GrampsAIO64-6.0.1\gramps\gui\editors\editeventref.py", line 334, in ok_clicked
    self.update(self.source_ref, self.source)
TypeError: EventAction._added_participant() takes 2 positional arguments but 3 were given

System Information:

Gramps version: AIO64-6.0.1--1
Python version: 3.12.10
BSDDB version: 6.2.9 (6, 0, 30)
sqlite version: 3.47.2
orjson version: 3.10.16
LANG: en_GB.UTF-8
OS: Windows

GTK version : 3.24.49
gobject version: 3.52.3
cairo version : (1, 28, 0)

[giotodibondone]

so I'm reporting it here instead of in the Gramp Bug Tracker.

Yes this is the correct place for this experimental unreleased addon.

Might be a while as the developer mentions

Really need to make some time to pivot back to this. Maybe this coming winter, don't see it happening in next few months for sure.

[giotodibondone]

How do I recreate this, failed so far?

Can you screenshot using example.gramps please?