See Prism Launcher changelogs:
9.3
Changes
- It is now possible to add an Offline account without adding a Ely/MSA account first
Fixes
- Fixed blank dialog appearing when opening the launcher with no accounts added
If you have any issues or questions, join the Discord server or open a new GitHub issue
If you're not sure what to download on Windows, click ElyPrismLauncher-Windows-MSVC-Setup-9.2.exe
Arch Linux users can download the ElyPrismLauncher-Linux-Pacman-x86_64.pkg.tar file and install it with pacman -U