Same here, isnt there any way to fix this?
I tried reinstalling UE5. Searching for Edit\Plugin bridge.
Reinstalled bridge app
Looked in marketplace (doesnt appear)
Vault checking and unchecking the category, it doesnt appear either.
Reinstalled the launcher
Removed the megascans folder from plugins.
I dont know what else to do
I solved the problem and maybe it will help someone else.
I read something into the matter and found out that the Quixel Bridge requires a Java version. You have to download and install this. However, the version of Java should be the most recent. After installing Java, the Quixel Bridge was noted in my library and I was able to add it to Unreal Engine 5 without any problems.