Hello there @El_Developer!
Considering your error and setup, an EXCEPTION_ACCESS_VIOLATION tied to UnrealEditor elements, aims at an issue with your plugins/drivers.
The first step would be to make sure that you are using the correct versions available versions for the plugins, and your GPU drivers, specially considering that you are switching between UE 5.4.4 and 5.5
Next, following the tutorial, since you want to work with Meta XR, test by disabling OpenXR in your .uproject file.
"Name": "OpenXR",
"Enabled": false
After that, please clear your cache, via closing the engine, deleting folders Saved, Intermediate, and DerivedDataCache. Then, regenarete your project files from .uproject (right-click > “Generate Visual Studio project files”).
Finally, test your project, as well as running a parallel test in an empty project, using the Meta plugins only, with no other elements added.