R Studio doesn't start

I have a student where RStudio doesn't start. I reinstalled it and deleted all the .RData and similar files. When opening RStudio it shows a popup showing if I want to open rstudio.exe from an unknown source. If I click yes a tiny popup appears for a fraction of a second and then it crashes.

When trying the diagnostics report with run the same happens, when I run it in the terminal it it states "[utils.ts] [createStandaloneErrorDialog] Error when creating Standalone Error Dialog: Error: application not set as s (C:\Program Files\RStudio\resources\app.webpack\main\index.js:8:321720) at (...) Unexpected token '', ""... is not valid JSON

She has R for Windows 4.4.1 and RStudio 2024.09.0+375. R works by itself without RStudio IDE.

System:
Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz 1.99 GHz
16 GB RAM
Windows 11 Home 24H2 20.11.2024 26100.2033
Windows Feature Experience Pack 1000.26100.23.0

She only has the Windows Defender installed no other Anti Virus programs.

Any idea what we could do?