Minecraft Bedrock, can't use skins I purchased

I have installed Minecraft Bedrock from the Windows App Store.

It wasn't always like this, but when I open up the Minecraft App, the Marketplace is always unavailable.

And to load the skins that I bought from Marketplace, I need to connect to Marketplace.

When I hover over my mouse on the Marketplace, the app says "Invalid Session try restarting game" OR "Playfab environment mismatch"  one of these 2 messages always pops up.

I have tried uninstalling the app and reinstalling it. Does not fix.

I have looked up Windows Setting and looked up Minecraft App, select "Terminate" related process and then "Reset" the app. Still no fix.

I have tried looking online, but I see other people with similar issues, and no solution.

At the very least, I am able to connect in other people's Realm and still play minecraft.

But it is very stressful and frustrating when you have purchased skins on marketplace and you can't use it. It's like Microsoft didn't give me the playable content I paid for and they just stole the money. This is unacceptable. 

And other people in the realm seems to have their skin available, but I can't access them. It makes me feel behind within my peers or that I'm just not as "cool" as everyone else is.