Looks like this is broken (12.9.5) for me on Ventura 13.7.3. has the same code-signing issue that was there with 15.1. Re-running retroactive has no effect. iTunes continues to work fine on Big Sur 11.7.10 and Ventura 13.7.2
I don't know how to solve error 42408. Try in iTunes settings - Restrictions to disable Store and other things you don't use.
What version of iTunes are you using?
Luckily I have a back up SSD ( I'm running my iMac on an external SSD drive ) at a lower version of Ventura so I can use that but it would be nice to have it run like it used to on the latest Ventura going forward.
Unfortunately disabling in iTunes restrictions didn't help.