I click on Microsoft Login and this is what happens (look at screenshot). I have perfectly fine Internet connection, and there isn't a problem with anything else. At the time, I am using a different client than the normal launcher.
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This bug tracker cannot support third party clients/launchers/servers. Please contact the owners.
For the vanilla (unmodified) environment; duplicates MCL-16928. Please attach the launcher_log.txt text file located in the [.minecraft|https://minecrafthopper.net/help/finding-minecraft-data-folder/] folder if available.
you should send this issue to MCL (Minecraft Launcher) instead MC (Minecraft: Java Edition)
In most cases, it's caused by Network or HTTP proxy reason. Check if you connected the proxy, if not, wait a minute and retry.