Class 'Pusher' not found when installing koel

Question

I'm trying to install 'koel' on my VPS (Debian Jessie).
I followed this guide (as well as many other guides before)
http://freedif.org/how-to-install-koel-an-opensource-music-streaming-app/

Did a npm install (throwing a incompatibility issue with fsevent:

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules/chokidar/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

) and them im trying to do a composer install. But i keep running into this error:

> php artisan clear-compiled
PHP Fatal error:  Class 'Pusher' not found in /home/streaming/koel/vendor/laravel/framework/src/Illuminate/Broadcasting/BroadcastManager.php on line 210


  [Symfony\Component\Debug\Exception\FatalErrorException]  
  Class 'Pusher' not found                                 


Script php artisan clear-compiled handling the post-install-cmd event returned with error code 255

I googled it but none of the suggested things worked (running composer require throws the same error, thus i cant require pusher/pusher-php-server etc.)

just in case here is the full output in a pastebin: http://pastebin.com/jz22Y74u

Answer 1

Running composer require pusher/pusher-php-server as suggested by @DerfK was returning the same error message.

I only got it to install correctly by running either
composer install or composer require pusher/pusher-php-server
with the --no-scripts flag.

After it ran through successfully I was able to continue using composer normally.

Answer 2

It looks like the composer dependency file for that project merely "suggests" installing pusher, but it is required for what you are trying to do. Run

composer require pusher/pusher-php-server

which should install it.