PowerPoint PowerBI-Add-in crashes when starting (Error 0xc0000005)
I'm having this issue with the PowerPoint Add-in of PowerBI. When i click on the Add-in to add the window below, it says "Loading..." until PowerPoint finally crashes. This has happened on other computers of the organization as well. I don't even know anymore where to look. Gemini says to clear the Add-in-Cache: "%LocalAppData%\Microsoft\Office\16.0\Wef\"
The only "solution" that worked, was to reinstall Windows, which is crazy.
I've tried to repair Office (Online). I've checked the Edge WebView version. Didn't work on 149.0.4022.98 and neither on the newest 150.0.4078.48.
Any help is appreciated, since the Add-in is barely documented!
Error from event viewer:
Fehlerhafter Anwendungsname: POWERPNT.EXE, Version: 16.0.20026.20166, Zeitstempel: 0x6a234e64
Fehlerhafter Modulname: osf99.dll, Version: 16.0.20026.20166, Zeitstempel: 0x6a2354bf
Ausnahmecode: 0xc0000005
Fehleroffset: 0x00000000000bb7a4
Fehlerhafte Prozess-ID: 0x948
Fehlerhafte Anwendungsstartzeit: 0x1DD0D387401A86E
Fehlerhafter Anwendungspfad: C:\Program Files\Microsoft Office\root\Office16\POWERPNT.EXE
Fehlerhafter Modulpfad: C:\Program Files\Microsoft Office\root\Office16\osf99.dll
Berichts-ID: 7282bc21-9698-4531-8584-e703d02c30d2
Posted Jul 6, 2026, 1:22 PM UTC