# Firebase Plugin Error

**URL:** <https://forum.mautic.org/t/firebase-plugin-error/20000>\
**Category:** Product Support\
**Tags:** mautic-3\
**Created:** [June 29, 2021, 11:21am UTC](https://forum.mautic.org/t/firebase-plugin-error/20000 "2021-06-29T11:21:38Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![mikew](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/mikew/32/5156_2.png) [@mikew](https://forum.mautic.org/u/mikew)\
**Post date:** [June 29, 2021, 11:21am UTC](https://forum.mautic.org/t/firebase-plugin-error/20000/1 "2021-06-29T11:21:38Z")

</div>

**Your software**  
My Mautic version is: 3.3.3  
My PHP version is: 7.4  
My Database type and version is: mariadb

**Your problem**  
My problem is:

After installing the firebase plugin (small explanation on plugin in previous [general discussion](https://forum.mautic.org/t/installing-the-firebase-plugin-for-mobile-app-push-notification/19999/2)) I am no longer able to create a campaign or edit a campaign.

These errors are showing in the log:

2021/06/29 10:51:29 [error] 88032#88032: \*1263 FastCGI sent in stderr: “PHP message: PHP Fatal error: Declaration of MauticPlugin\FCMNotificationBundle\Api\FCMApi::sendNotification($playerId, Mautic\NotificationBundle\Entity\Notification $notification, $notificationId) must be compatible with Mautic\NotificationBundle\Api\AbstractNotificationApi::sendNotification($id, Mautic\NotificationBundle\Entity\Notification $notification) in /var/www/mautic/plugins/FCMNotificationBundle/Api/FCMApi.php on line 163” while reading response header from upstream, client: 10.0.14.88, server: 10.104.11.147, request: “GET /s/campaigns/view/1?\_=1624963884464&mauticUserLastActive=5&mauticLastNotificationId= HTTP/1.1”, upstream: “fastcgi://unix:/run/php/php7.4-fpm.sock:”, host: “10.104.11.147”, referrer: “[http://10.104.11.147/s/campaigns](http://10.104.11.147/s/campaigns)”

Steps I have tried to fix the problem:  
Wrote to app developer and awaiting support from them.

---

<div class="post-metadata">

**Author:** ![ebola](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/ebola/32/5961_2.png) [@ebola](https://forum.mautic.org/u/ebola)\
**Post date:** [October 5, 2021, 8:56am UTC](https://forum.mautic.org/t/firebase-plugin-error/20000/2 "2021-10-05T08:56:32Z")

</div>

Hi @mikew !

To clear and somewhat close this thread also, as we are the developers of the plugin I wrote some official information about it, to make clear about it everything: [Installing the Firebase Plugin for Mobile App Push Notification - #2 by ebola](https://forum.mautic.org/t/installing-the-firebase-plugin-for-mobile-app-push-notification/19999/2)

I hope I can say that currently we have no unknown problems, all what we ‘got’ in the last some weeks we had already solved.