* 'character = X': So this works both as a general trigger, and also in a "defending_against_claimant" clause?
* Non factor entry: Can you post the exact, full error message? This should be off by default.
* religion_group, tier: Can you post the exact error message? As for case-sensitivity, consistency is good so the Validator (usually) enforces it.
* XXXX years old: I fixed a related bug after looking into this, but it shouldn't have caused your message. Maybe you can post the error in case something else is wrong?
* PREV: It is probably an unrelated issue than what you think, can you post the event file? Or if you have this mod downloadable, I can look through the error messages.
* is_landed: Seeing the whole event would be helpful
* 'valid localization key': The validator can't well what is a localization key and what is a string, so it treats everything as localization keys, but you can disable localization checking.
* c_xxxxx is not a valid AnyTitle: I'd need to look closer into this, so a mod download would be useful.
Thank you! You can download the mod here: Britannia 479 AD - The Winter King.
What is the quickest way to post full exact error messages? I mean... is there a file containing error reports from which I can copy and then paste here?