PROWL notifications stopped working

Long standing PROWL notifications started failing today using the Home Assistant Prowl platform. I can trigger a notification directly at A reboot hasn’t helped.

System details:

Version	core-2021.12.9
Installation Type	Home Assistant OS
Development	false
Supervisor	true
Docker	true
User	root
Virtual Environment	false
Python Version	3.9.7
Operating System Family	Linux
Operating System Version	5.10.88
CPU Architecture	x86_64
Timezone	Europe/London

The error I see in the log is:

Error executing script. Unexpected error for call_service at pos 2: Cannot connect to host ssl:True [SSLCertVerificationError: (1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1129)')]

Has anyone else started experiencing this issue or does anyone have any ideas on how to resolve it? Thanks.

Did you restart since yesterday? It seems they just updated their SSL certificate

I did a restart last night. After the notifications failed today I did another restart, which didn’t resolve things.

Not sure what changed, but Prowl notifications resumed a few hours later with no changes at my end.