Warning: The following is just a complete guess based off the file name and the error message. I might be completely wrong, but I'm still taking a crack at it.
It looks like some build tech you have is required to be a tech that builds mines.
Or the AI is trying to use one of your techs as a tech that builds mines and the system is warning you.
Not sure which of those, if either one, is correct. Is there any entity file you added to the entity.manifest before receiving this message that when included is causing this error?