Operations specified with -1 or 0 in the config, e.g. /marry gift do not work. There is a message that a minimum proximity of -1 blocks is required. This problem can only be solved with the permission marry.bypass.rangelimit.

MarriageMaster: 2.0.16
Paper 1.13.2 - 648

# Ranges for actions
# -1 no range limit and no world limit, 0 no range limit but in the same world, >= 1 range limit in meters/blocks
Range:
  Marry: 25
  Divorce: -1
  Backpack: 5
  Gift: -1
  Kiss: 0
  KissInteract: 25
  Hug: 5
  HearthVisible: 128
  BonusXP: 10
  Heal: 2

Thanks for reporting. I have found the problem. And it should be fixed with this build.
I am currently not at home so I haven't tested it yet.

It works perfectly fine, thank you very much!