the question is, which one of those packages the wrong function and breaks your game...
you're going to have to go through and start disabling chunks of your add-ons. since you have 587 of the goddamned things, you have two ways of going about this.
1: disable all add-ons and enable 100 at a time. when the error shows up, disable the last 100 and enable them 25 at a time. when the error shows up, disable the last 25 and enable 5... etc
2: disable all add-ons and enable them by group - all content_ add-ons, then all weapon_ add-ons... then break those individual groups into chunks.
every time you enable a certain amount, you're going to have to die by falling damage.
you could, when enabling 100, disable the previous 100 to speed up loading time. if you never run across the error while doing so, then the problem is a confliction between add-ons. start over and this time keep them enabled.