Getting an error using SF Ruleset with 3.3.10

[ssostac1]

When I bring up the SF ruleset (no extensions loaded), I get the following error

Script Error: [string "ps/scripts/ps_main.lua"]:24: attempt to call field 'onHealthChanged' (a nil value)

Scott

[stephan_]

I had the error, too (either after installing COM or the recent ruleset update).

I replaced the PCs in the Combat Tracker and Party sheet and haven't gotten the error since then.

Edit: I just got the error again after starting the server (maybe because some players leveled up).