title: Firebase FCM InternalServerError
body: <p>I implemented Firebase FCM in my app about a month ago, and it has worked great ever since, until today. When I am trying to send a push notification from my console, nothing ever shows up. I find this very strange considering it worked before I went to bed yesterday. I do also have a PHP script that sends push notifications (FCM) as well, which also was working - but when I try to use this to send a push notification, I get this: </p>
  
  <p><code>{"multicast_id":5593178441415796544,"success":0,"failure":1,"canonical_ids":0,"results":[{"error":"InternalServerError"}]}</code></p>
  
  <p>I find this very strange. I Googled this, and I read something about re-generating my APNS certificates (because they might be wrong or something), which I thought was weird as well, due to the fact that I created new certificates yesterday as well (which was working). Now I have once again tried to delete, and generate new - without any luck. </p>
  
  <p>I also want to point out that when I go to my 'Cloud messaging' tab in Firebase, to configure my certificates, I am unable to delete - only re-upload. </p>
  
  <p>What could this possibly be? I have checked my certificates and my API key is correct. It was working 100% 10 hours ago.</p>
  
  <p>Could this be a Firebase problem, or how would I solve this? Help is much appreciated.</p>