What happened? How did it happen? What are the steps to replicate the issue.
The standard install of Orion simply won't start under Sonoma. No windows appear, app simply freezes before doing anything, have to Force Quit. No obvious way to install any other Orion version, as I was asked once to install RC version, and apparently clicking Cancel was treated as an irrevocable permanent decision. Regrettably going back to Safari until you fix this, or possibly for good. Unimpressed.
What did you expect to happen? Describe the desired functionality.
I expected Orion to open. Like apps do.
What version of Orion are you running?
About not available