I downloaded and installed the latest versions of EUP Law and Order, EUP Serve and Rescue, and the EUP Menu. It is coming up with an error when I load the EUP menu plugin and it says that I'm missing the MPChristmas2017 DLC. However, I do have MPChristmas2017 in my mods folder under mods > update > x64 > dlcpacks and it's declared in the dlclist.xml file. I do have the default police characters (city, county, and highway patrol) modded so they have different uniforms, not sure if that would effect it but I don't think so. I've been having this problem for a while. Any help is greatly appreciated!

Im having the same issue have you fixed it?

I think EUP gathers some police related clothing from there, I think you should move the files to somewhere else, then copy the folder from the vanilla files and replace it.