Anytime that my automation fails to find a selector, even when wrapped in a try/catch, UiPath auto-generated a “possible solutions include…” log with a bunch of lines that are not particularly helpful. I’ve looked through the project settings but can’t seem to find a way to turn these off, and they’re pretty annoying. Can these be disabled?

No option to turn it off but you can throw a custom exception in catch in case of any exception using Throw activity.
Welcome to the community
Thoseare the default exceptions that are thrown
In the catch a different exception can be thrown instead of this
Cheers