That actually worked! I’m not sure why disabling verification would cause this degree of log spew, but enabling verification does now seem to be able to pick up my UniFi system’s cert and chain it to my CA (or if not, it’s stopped complaining about it). Either way my logs are back to their normal state, so thanks!
edit: ugh spoke too soon - that got rid of the errors by just not working at all, presumably as it’s failing the SSL check on account of not having and CAs defined.