Can no longer install Mixed Reality Link

(for context, I am using a Galaxy Book4 Edge (ARM) on the latest non-Insider Version of Windows)

I already had Mixed Reality Link installed on my Laptop and it worked perfectly fine, it paired with my Quest 3S and displayed an Image no problem.

A few weeks ago the App would no longer open, it wouldn't display any error and no window would show (needless to say, I couldn't get the Headset to connect either).

Repairing or resetting the App through the Settings App didn't do anything, so I tried to reinstall it. Windows showed the App as being installed, while Microsoft Store said it wasn't installed, so that could've been my first hint that something weird was going on. I tried to uninstall the App, it would say that it was uninstalling but do nothing. 

So I tried just to reinstall, and it wouldn't do it. It would download the app no problem but then at 100% with the text "almost ready" (I guess that's what it's saying in English, my Laptop is set to German) it would fail stating "An Error occured. We are aware of the problem and trying to fix it. Please try again later" with error code 0X80073B2F. Googling this error code only resulted in SQL server express errors, Windows update errors and other MS-Store error codes, which didn't provide a solution.

The error (in German)

So I did, I tried again later, first a few hours later, then a few days, but the error persistet. I thought that maybe the issue was that it was still kinda installed. Trying to fix it, I removed the Appx-Package from an elevated Powershell, but that didn't help either, Mixed Reality Link was no longer broken in my start menu (as in, it was now uninstalled) but trying to reinstall it it would throw exactly the same error. I also tried installing via Winget but that had the same issue and threw the same Error code.

Note that other MS-Store apps can be installed no problem.

I'm kinda at a loss of what could be the issue. I'd be grateful for any help.

Edit: after a bit more troubleshooting I noticed that 0x8007 errors relate to Appx deployment, however 0x80073B2F wasn't documented at https://learn.microsoft.com/en-us/windows/win32/appxpkg/troubleshooting#common-error-codes. Through a bit more digging I found out that certutil can provide help information for Appx error codes, so, expecting nothing, I ran

certutil -error 0x80073b2f

and this actually produced the following output:

0x80073b2f (WIN32: 15151 ERROR_PRI_MERGE_ADD_FILE_FAILED) -- 2147957551 (-2147009745)

together with the explanation (roughly translated): "One of the PRI files couldn't be added to the merged file".

Now, of course, ERROR_PRI_MERGE_ADD_FILE_FAILED isn't documented anywhere and the error message isn't particularly helpful ever. I found out PRI files have something to do with indexing but that didn't help me.

So, I'm once again stuck without any real progress.