Already tried installing a different Java Version, that didn't help either. Clicking on "Open Log" does absolutely nothing, so I can't even give you guys an error Log.
I use Solus Linux 4.9 Serenity and the newest Version of the Prism launcher that is in my distro's repos (11.0.2)
On both of my computers (one with arch another with debian unstable) prism launcher takes around 5 minutes to launch an instance, much of that time taken "logging into microsoft account" (stuck at zero percent while initializing). Using the appimage for both computers. Tried using the pacman for the arch computer and did not fix the problem. Have not tried the flatpak yet but I have very little hope it will fix the problem.
Everything about the launch seems normal other than the time.
Edit: Tired the flatpack and for whatever reason couldn't even log into a Microsoft account in the first place. Went through the steps and the website said successfully logged in and on the app, nothing happened.