CSV not working as input or output

[fjs-acc]

Hi, I'm having problems using a csv with the rapl-formula, as the title suggests. Whenever I try to run it (using the commands provided in the documentation) I recieve the following console output:

DEBUG::1673959442.8503227::pusher_power::received message StartMessage
INFO::1673959442.8508985::pusher_power::pusher_power started
DEBUG::1673959442.8619356::cpu_dispatcher::received message StartMessage
INFO::1673959442.8625019::cpu_dispatcher::cpu_dispatcher started
DEBUG::1673959442.8739498::puller::received message StartMessage
INFO::1673959442.874641::puller::puller started
WARNING::1673959442.941727::puller::received unrecognized message : Poison<WakeupMessage(0:00:00.050000, None)>: Traceback (most recent call last):
File "/opt/powerapi/.local/lib/python3.8/site-packages/thespian/system/actorManager.py", line 163, in _handleOneMessage
actor_result = self.actorInst.receiveMessage(msg, envelope.sender)
File "/opt/powerapi/.local/lib/python3.8/site-packages/thespian/actors.py", line 838, in receiveMessage
r = getattr(klass, methodName)(self, message, sender)
File "/opt/powerapi/.local/lib/python3.8/site-packages/powerapi/actor.py", line 188, in receiveMsg_WakeupMessage
self._launch_task()
File "/opt/powerapi/.local/lib/python3.8/site-packages/powerapi/puller.py", line 97, in _launch_task
raw_report = self._pull_database()
File "/opt/powerapi/.local/lib/python3.8/site-packages/powerapi/puller.py", line 132, in _pull_database
return next(self.database_it)
File "/opt/powerapi/.local/lib/python3.8/site-packages/powerapi/database/csvdb.py", line 136, in next
current_timestamp = self.saved_timestamp
AttributeError: 'CsvIterDB' object has no attribute 'saved_timestamp'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/opt/powerapi/.local/lib/python3.8/site-packages/thespian/system/actorManager.py", line 178, in _handleOneMessage
actor_result = self.actorInst.receiveMessage(copy.deepcopy(msg), envelope.sender)
File "/opt/powerapi/.local/lib/python3.8/site-packages/thespian/actors.py", line 838, in receiveMessage
r = getattr(klass, methodName)(self, message, sender)
File "/opt/powerapi/.local/lib/python3.8/site-packages/powerapi/actor.py", line 188, in receiveMsg_WakeupMessage
self._launch_task()
File "/opt/powerapi/.local/lib/python3.8/site-packages/powerapi/puller.py", line 97, in _launch_task
raw_report = self._pull_database()
File "/opt/powerapi/.local/lib/python3.8/site-packages/powerapi/puller.py", line 132, in _pull_database
return next(self.database_it)
File "/opt/powerapi/.local/lib/python3.8/site-packages/powerapi/database/csvdb.py", line 136, in next
current_timestamp = self.saved_timestamp
AttributeError: 'CsvIterDB' object has no attribute 'saved_timestamp'

Is there anything I can do to fix this issue?