Has anyone gotten Kadira working?

I’ve tried a few flavors of Kadira including MontiAPM (using montiapm:agent) and NodeChef (tried both meteorhacks:kadira and lmachens:kadira) but can’t seem to get past a server error on startup…

Here’s the error using lmachens:kadira agent:

I20210317-20:00:54.409(-7)? Exception in callback of async function: TypeError: Cannot read property 'prototype' of undefined
I20210317-20:00:54.409(-7)?     at setLabels (packages/lmachens_kadira.js:3692:46)
I20210317-20:00:54.410(-7)?     at packages/lmachens_kadira.js:3201:5
I20210317-20:00:54.410(-7)?     at runWithAFiber (packages/lamhieu_meteorx.js:217:5)
I20210317-20:00:54.410(-7)?     at packages/lamhieu_meteorx.js:210:5
I20210317-20:00:54.410(-7)?     at Array.forEach (<anonymous>)
I20210317-20:00:54.410(-7)?     at packages/lamhieu_meteorx.js:209:27

And same error using MontiAPM agent:

I20210317-19:13:21.709(-7)? Exception in callback of async function: TypeError: Cannot read property 'prototype' of undefined
I20210317-19:13:21.710(-7)?     at setLabels (packages/montiapm:agent/lib/hijack/set_labels.js:9:46)
I20210317-19:13:21.710(-7)?     at packages/montiapm:agent/lib/hijack/instrument.js:45:5
I20210317-19:13:21.710(-7)?     at runWithAFiber (packages/lamhieu_meteorx.js:217:5)
I20210317-19:13:21.710(-7)?     at packages/lamhieu_meteorx.js:210:5
I20210317-19:13:21.711(-7)?     at Array.forEach (<anonymous>)
I20210317-19:13:21.711(-7)?     at packages/lamhieu_meteorx.js:209:27

It’s happening in kadira/lib/hijack/set_labels.js at line 9:

var originalSendAdds = MeteorX.Multiplexer.prototype._sendAdds;

Apparently MeteorX.Multiplexer is undefined

I’ve tested it on another Meteor app I have and it works fine. So the bug seems to be specific to Rocket Chat.

Any help would be appreciated!

Currently running:
Rocket.Chat 3.7.4
Dev machine: OS X 10.15.7 Catalina