HTTPEventOutputPlugin' object has no attribute 'serverPool' v7.2.1

[khayamgondal]

v7.2.1 throws the following exception. Python:3.9.2 DockerImage:nginx

eventgen        2022-04-06 15:08:42 eventgen        ERROR    MainProcess Unexpected character in found when decoding object value
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/dist-packages/splunk_eventgen/lib/plugins/output/httpevent_core.py", line 136, in updateConfig
    self.httpeventServers = json.loads(config.httpeventServers)
ValueError: Unexpected character in found when decoding object value
2022-04-06 15:08:42 eventgen        ERROR    MainProcess 'HTTPEventOutputPlugin' object has no attribute 'serverPool'
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/dist-packages/splunk_eventgen/lib/plugins/output/httpevent_core.py", line 250, in _sendHTTPEvents
    self._transmitEvents(stringpayload)
  File "/usr/local/lib/python3.9/dist-packages/splunk_eventgen/lib/plugins/output/httpevent_core.py", line 261, in _transmitEvents
    targetServer.append(random.choice(self.serverPool))
AttributeError: 'HTTPEventOutputPlugin' object has no attribute 'serverPool'
2022-04-06 15:08:42 eventgen        ERROR    MainProcess failed indexing events, reason: 'HTTPEventOutputPlugin' object has no attribute 'serverPool'

EventGen conf file

[cyclical.csv]
mode=sample
interval=60
count=1
outputMode=httpevent
httpeventServers = {"servers": [{"protocol": "https", "port": "8088", "key": "0617eea5-87a9-4d18-8ed4-6dc085ddbe2c"", "address": "172.19.15.140"}]}
index=main
sourcetype=eventgen
sampletype=csv
source=eventgen_cyclical

Running it using python3 -m splunk_eventgen -v generate -s cyclical.csv eventgen.conf