FCM-Fehler bei der Verwendung mit Ring Integration

[hhschu01]

The problem

Auf meiner Home-Assistant Installation werden die Events "klingeln" und "Bewegung" nicht mehr aktualisiert weil der FCMPUSHCLIENT stirbt

Daher habe ich eine komplett frische Home-Assistant-Installation auf einem Rasberry PI 4 durchgeführt um das Problem nachzuvollziehen.

Es tritt immer wieder derselbe FCM-Fehler auf:

2026-08-14 13:20:50.121 ERROR (MainThread) [firebase_messaging.fcmpushclient] Unknown error: Incorrect padding, shutting down FcmPushClient.
Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/firebase_messaging/fcmpushclient.py", line 688, in _listen
await self._handle_message(msg)
File "/usr/local/lib/python3.14/site-packages/firebase_messaging/fcmpushclient.py", line 605, in _handle_message
self._handle_data_message(msg)

File "/usr/local/lib/python3.14/site-packages/firebase_messaging/fcmpushclient.py", line 439, in _handle_data_message
decrypted = self._decrypt_raw_data(
self.credentials, crypto_key, salt, msg.raw_data
)
File "/usr/local/lib/python3.14/site-packages/firebase_messaging/fcmpushclient.py", line 378, in _decrypt_raw_data
crypto_key = urlsafe_b64decode(crypto_key_str.encode("ascii"))
File "/usr/local/lib/python3.14/base64.py", line 131, in urlsafe_b64decode
return b64decode(s)
File "/usr/local/lib/python3.14/base64.py", line 85, in b64decode
return binascii.a2b_base64(s, strict_mode=validate)
~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
binascii.Error: Incorrect padding

Gibt es dafür einen Workaround oder eine Lösung?

Danke

### What version of Home Assistant Core has the issue?

2026.8.1 

### What was the last working version of Home Assistant Core?

_No response_

### What type of installation are you running?

Home Assistant Core

### Integration causing the issue

RING

### Link to integration documentation on our website

https://www.home-assistant.io/integrations/ring

### Diagnostics information

Debug output:

2026-08-14 13:20:50.121 ERROR (MainThread) [firebase_messaging.fcmpushclient] Unknown error: Incorrect padding, shutting down FcmPushClient.
Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/firebase_messaging/fcmpushclient.py", line 688, in _listen
await self._handle_message(msg)
File "/usr/local/lib/python3.14/site-packages/firebase_messaging/fcmpushclient.py", line 605, in _handle_message
self._handle_data_message(msg)
~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^
File "/usr/local/lib/python3.14/site-packages/firebase_messaging/fcmpushclient.py", line 439, in _handle_data_message
decrypted = self._decrypt_raw_data(
self.credentials, crypto_key, salt, msg.raw_data
)
File "/usr/local/lib/python3.14/site-packages/firebase_messaging/fcmpushclient.py", line 378, in _decrypt_raw_data
crypto_key = urlsafe_b64decode(crypto_key_str.encode("ascii"))
File "/usr/local/lib/python3.14/base64.py", line 131, in urlsafe_b64decode
return b64decode(s)
File "/usr/local/lib/python3.14/base64.py", line 85, in b64decode
return binascii.a2b_base64(s, strict_mode=validate)
~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
binascii.Error: Incorrect padding

### Example YAML snippet

```yaml

```

### Anything in the logs that might be useful for us?

```txt
see above
```

### Additional information

Sometimes it works for 1 event or even for hours but never for more than 1 Day

[home-assistant]

Hey there @sdb9696, mind taking a look at this issue as it has been labeled with an integration (ring) you are listed as a code owner for? Thanks!

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---

@hhschu01 Thanks for reporting this issue!

Before we dive in, please make sure this isn't a duplicate by searching through existing issues. Also check recently closed issues, as your problem might already be fixed but not yet released.

https://github.com/home-assistant/core/issues?q=%20label%3A%22integration%3A%20ring%22%20
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---

ring documentation
ring source
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[rndm2]

Same.

I updated my integration to fix this while upstream is working on fix

[wolfhass]

@rndm2 thanks for your link to the Ring Intercom Health workaround. Can you share a screenshot with the entities? Is this workaround reliable? I see "only" 1 star and 0 forks. I suppose the Ring Integration with the FCM affects a lot of people.

Thanks

[mwav3]

Can confirm the updated fcmpushclient.py file in the PR linked by rndm2 sdb9696/firebase-messaging#43 fixed the issue on my install, no log padding error anymore and the sensors are working for motion and ding again.

[rndm2]

@rndm2 thanks for your link to the Ring Intercom Health workaround. Can you share a screenshot with the entities? Is this workaround reliable? I see "only" 1 star and 0 forks. I suppose the Ring Integration with the FCM affects a lot of people.

Thanks

If reliability is at question I wouldn’t use it.

[wolfhass]

@mwav3 @rndm2 how can I apply that fix on my home assistant installation or do I have to wait for an update?
Thanks

[rndm2]

Or use health integration. It will do it for you

[zondajag]

What health integration?
Are you referring to this @rndm2?

https://github.com/rndm2/ring_intercom_health

I am seeing these issues as well.

Logger: firebase_messaging.fcmpushclient
Source: runner.py:290
First occurred: 12:18:35 (1 occurrence)
Last logged: 12:18:35

Unknown error: Incorrect padding, shutting down FcmPushClient. Traceback (most recent call last): File "/usr/local/lib/python3.14/site-packages/firebase_messaging/fcmpushclient.py", line 688, in _listen await self._handle_message(msg) File "/usr/local/lib/python3.14/site-packages/firebase_messaging/fcmpushclient.py", line 605, in _handle_message self._handle_data_message(msg) ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^ File "/usr/local/lib/python3.14/site-packages/firebase_messaging/fcmpushclient.py", line 439, in _handle_data_message decrypted = self._decrypt_raw_data( self.credentials, crypto_key, salt, msg.raw_data ) File "/usr/local/lib/python3.14/site-packages/firebase_messaging/fcmpushclient.py", line 378, in _decrypt_raw_data crypto_key = urlsafe_b64decode(crypto_key_str.encode("ascii")) File "/usr/local/lib/python3.14/base64.py", line 131, in urlsafe_b64decode return b64decode(s) File "/usr/local/lib/python3.14/base64.py", line 85, in b64decode return binascii.a2b_base64(s, strict_mode=validate) ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^ binascii.Error: Incorrect padding

Update: Adding that integration via HACS seems to work, I had to select the ding entity directly as there are some fields that aren't actually optional. Hopefully the fixes make their way into the core Ring integration at some point. I will report back if things stop working again.