Firebase FCM InternalServerError

I implemented Firebase FCM in my application about a month ago, and it has been working fine from then until today. When I try to send a push notification from my console, nothing appears. I find it very strange considering that it worked before I went to bed yesterday. I also have a PHP script that also sends push notifications (FCM), which also worked, but when I try to use this to send push notifications, I get the following:

{"multicast_id":5593178441415796544,"success":0,"failure":1,"canonical_ids":0,"results":[{"error":"InternalServerError"}]}

I find it very strange. I was looking for this and I read something about re-generating my APNS certificates (because they might be wrong or something else), which in my opinion was strange due to the fact that I created new certificates yesterday (which worked) Now I again tried to delete and create a new one - with no luck.

I also want to note that when I go to the "Cloud Messages" tab in Firebase to configure my certificates, I cannot delete - just reload.

What could it be? I checked my certificates and my API key is correct. He worked 100% 10 hours ago.

Could this be a Firebase problem or how can I solve this? Help is much appreciated.

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firebase firebase-cloud-messaging
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1 answer

Most of the InternalServerError returned by FCM before February 2017,
were caused by problems with APN certificates.

The API is now updated. Now, if there is a problem with the APN certificate,
FCM will return error:InvalidApnsCredential

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