There's a Comp/Con FAQ with an entry that covers this particular error, though what it appears to boil down to is:
This error simply means COMP/CON couldn’t find whatever item you were referencing. Sometimes it’s an invalid tag, sometimes it’s an ID that’s not found.
COMP/CON can’t tell you anything more specific than “something is missing”, so you’ll have to start retracing your steps until you have a functioning LCP, and figuring out exactly which part you misspelled.
It's unclear to me what in the lcp specifically could be causing this issue given that the latest version has been around since December 2023. It hasn't been causing regular, repeated errors of this type, so I apologize for not being able to give any more help, but I'm afraid I don't know what could specifically be causing this issue for you.