Hello, 

I've already migrated my Mojang account to a Microsoft account. and once I did everything was normal and okay, 5 days later and once I start my Minecraft launcher. there is a tab bar that appears that says "Oh no! something went wrong, we couldn't connect to the Minecraft services." 

It shows my migrated Server is active, however, the play button is saying Play demo and it wants me to pay to get the full version of the game?

i deleted the launcher from my Pc and Reinstalling it, but nothing changes I'm still having this issue.