This worked for me. I had just one key without subkeys and it was package volume 2. After restarting PC, the store gave me a error 0x80131500 “check my connection try again later” I found on the internet that doing this worked for me and now im actively downloading the latest msfs update
: 1 - click on START and type " Internet Options "
2 - click on it and when a new windows will pop-up click on ADVANCED
3 - scroll down till the end
4 - Unflag " Use SSL 3.0 ", " Use TLS 1.0 ", " Use TLS 1.1 "
5 - Flag " Use TLS 1.2 ", " Use TLS 1.3 (experimental) "
6 - click on APPLY and then close the window
7 - Restart