Launcher error

My problem is that days ago, he opened the launcher as usual to play but it took a long time to load, he told me that he did not have internet but if he did, then he told me that I could only play the demo and that to play it I needed to buy it I bought it ago like 2 years. Disassemble it and reinstall it many times and when I log in to my microsoft account it tells me that I have no connection and I can't log in, I've been trying to find solutions for days but I can't find them, I hope they can help me