Doesn't get enabled.

Spigot Version: CraftBukkit version git-Spigot-1a3504a-dfa7583 (MC: 1.13.2)
That is the final spigot build for 1.13.2.
MM Version: 1.31.16

https://pastebin.com/gRZrQ1qF

There is a problem with your config file. The PrivateFormat option is either missing or not a valid string.

In case you need it, this is the default value:

Chat:
  ToggleCommand: chattoggle
  PrivateFormat: '<heart> %1$s&r => %2$s: %3$s'

Thank you, it works.

Now I made a mistake in this thread. I forgot I was going to use V2 for the json text. My apologies. Downloading the latest MM V2 and PluginLib from ci.pcgamingfreaks.at gives me this on startup:
https://pastebin.com/qxntZqTX

I have removed the old MarriageMaster and PCGF_PluginLib folder from the plugins folder trying to generate new ones and I've also tried to only have MM and PluginLib in the plugins folder but I get the same error.

Thanks for the report. Build #69 was faulty.
This build should fix the problem: https://ci.pcgamingfreaks.at/job/MarriageMaster%20V2/70/artifact/target/MarriageMaster-2.0-RC2-SNAPSHOT.jar

Thank you!