Received this error today when plugin had previously worked fine:

06:08 [Error] NoDecay v1.1.5: Failed to load config file (is the config file corrupt?) (Invalid character after parsing property name. Expected ':' but got: M. Path 'Multipliers.horseMultiplier', line 47, position 3.)
06:08 [Error] [No Decay] Error loading config, using default values
06:08 [Info] Loaded plugin No Decay v1.1.5 by 0x89A

Your configuration was not edited correctly. Make sure to follow the default format when editing it, and make sure it is valid JSON.

I did not edit anything to do with horses in the config.

First I would suggest validating your config here, if it is valid, then if you could show me your config that would be great.

 I was looking at the config, I found the problem... and extra " with nothing after it that I neglected to delete.    Deleted that and json validated.   Sorry to have troubled you for my own error.

No problem, glad you got it fixed :)