got error when running healthchecker report script

Run healthchecker report on my mac, I got error as below

Thuans-MacBook-Pro:cbhealthchecker thuan$ ./cbhealthchecker -c 10.3.121.13:8091 -u Administrator -p password
bucket: default
node: 10.3.121.15 11210
node: 10.3.121.13 11210
node: 10.3.121.22 11210
node: 10.3.121.20 11210
node: 10.3.121.24 11210
node: 10.3.121.17 11210
node: 10.3.121.14 11210
node: 10.3.121.16 11210
node: 10.3.121.25 11210
node: 10.3.121.23 11210
bucket: saslbucket
node: 10.3.121.15 11210
node: 10.3.121.13 11210
node: 10.3.121.22 11210
node: 10.3.121.20 11210
node: 10.3.121.24 11210
node: 10.3.121.17 11210
node: 10.3.121.14 11210
node: 10.3.121.16 11210
node: 10.3.121.25 11210
node: 10.3.121.23 11210
..................
..................
Exception launched when processing counter: activeDiskQueueDrainRate
Traceback (most recent call last):
File "/Users/thuan/work/cbhealthchecker/analyzer.py", line 74, in run_analysis
result = eval("

{0}.{1}().run(counter, scale, threshold.{2})".format(package_name, counter['code'], capsule_name))
File "<string>", line 1, in <module>
File "/Users/thuan/work/cbhealthchecker/diskqueue_stats.py", line 173, in run
disk_len_vals = len_values["nodeStats"][node]
KeyError: u'10.3.121.14:8091'
Exception launched when processing counter: replicaDiskQueueDrainRate
Traceback (most recent call last):
File "/Users/thuan/work/cbhealthchecker/analyzer.py", line 74, in run_analysis
result = eval("{0}

.

{1}

().run(counter, scale, threshold.

{2}

)".format(package_name, counter['code'], capsule_name))
File "<string>", line 1, in <module>
File "/Users/thuan/work/cbhealthchecker/diskqueue_stats.py", line 173, in run
disk_len_vals = len_values["nodeStats"][node]
KeyError: u'10.3.121.14:8091'