Parsedmarc freezes at the delete_message / move_message step

[GuuB]

Hello,
I am setting up parsedmarc to collect messages from a msgraph mailbox and send them to splunk.
When I run the service, it stalls on the delete_message step. I tried changing the delete setting to false, but the move_message step also stalls.

I have manually tested the msgraph API and the Splunk HEC API successfully.

I don't know what I'm missing as there are no errors.

Here is my parsedmarc.ini file, with the credentials removed.
[general]
save_aggregate = True
save_forensic = True
debug = True
n_procs = 6
chunk_size = 50
silent = False

[mailbox]
watch = True
delete = False
batch_size = 1

[msgraph]
auth_method = ClientSecret
client_id = my_client_id
client_secret = my_client_secret
tenant_id = my_tenant_id
mailbox = my_mailbox

[splunk_hec]
url = xx
token = xx
index = parsedmarc
skip_certificate_verification = True

Any help is appreciated, thanks