Permisions error using Splunk AddOn for Microsoft Office 365- How would we resolve?

[joshiro]

We are using Splunk Enterprise OnPrem 8.2.3.3 with the add-on version 4.1.0.
Our client configured the permissions according to the documentation but the following error keeps raising:

2022-09-14 10:28:53,294 level=ERROR pid=20311 tid=MainThread logger=splunk_ta_o365.modinputs.graph_api pos=utils.py:wrapper:72 | datainput=b'O365ServicesUserCounts' start_time=1663169316 | message="Data input was interrupted by an unhandled exception." 
Traceback (most recent call last):
  File "/opt/splunk/etc/apps/splunk_ta_o365/bin/splunksdc/utils.py", line 70, in wrapper
    return func(*args, **kwargs)
  File "/opt/splunk/etc/apps/splunk_ta_o365/bin/splunk_ta_o365/modinputs/graph_api/__init__.py", line 109, in run
    return consumer.run()
  File "/opt/splunk/etc/apps/splunk_ta_o365/bin/splunk_ta_o365/modinputs/graph_api/GraphApiConsumer.py", line 62, in run
    items = [endpoint.get('message_factory')(item) for item in reports.throttled_get(self._session)]
  File "/opt/splunk/etc/apps/splunk_ta_o365/bin/splunk_ta_o365/common/portal.py", line 573, in throttled_get
    return self.get(session)
  File "/opt/splunk/etc/apps/splunk_ta_o365/bin/splunk_ta_o365/common/portal.py", line 599, in get
    raise O365PortalError(response)
splunk_ta_o365.common.portal.O365PortalError: 403:{"error":{"code":"UnknownError","message":"{\"error\":{\"code\":\"S2SUnauthorized\",\"message\":\"Invalid permission.\"}}","innerError":{"date":"2022-09-14T15:28:38","request-id":"72bea9b3-7f84-4063-9be4-05a4d331f39d","client-request-id":"72bea9b3-7f84-4063-9be4-05a4d331f39d"}}}

Also:

2022-09-14 10:28:53,294 level=ERROR pid=20311 tid=MainThread logger=splunk_ta_o365.modinputs.graph_api.GraphApiConsumer pos=GraphApiConsumer.py:run:74 | datainput=b'O365ServicesUserCounts' start_time=1663169316 | message="Error retrieving Graph API Messages." exception=403:{"error":{"code":"UnknownError","message":"{\"error\":{\"code\":\"S2SUnauthorized\",\"message\":\"Invalid permission.\"}}","innerError":{"date":"2022-09-14T15:28:38","request-id":"72bea9b3-7f84-4063-9be4-05a4d331f39d","client-request-id":"72bea9b3-7f84-4063-9be4-05a4d331f39d"}}}

Anyone knows what is the missing or misconfigured permission?