[webui][api] Fix ArgumentError EventBase model

Error message was:
  ArgumentError in Webui::PackageController#submit_request
    wrong number of arguments (1 for 0)

src/api/app/models/event/base.rb

@@ -150,7 +150,7 @@ def perform_create_jobs
         eclass = job.to_s.camelize.safe_constantize
         raise "#{job.to_s.camelize} does not map to a constant" if eclass.nil?
         djob = eclass.new(self)
-        raise "#{job.to_s.camelize} is not a CreateJob" unless djob.is_a? CreateJob
+        raise("#{job.to_s.camelize} is not a CreateJob") unless djob.is_a?(CreateJob)
         opts = {}
         opts = { queue: eclass.job_queue } if eclass.methods.include? :job_queue
         Delayed::Job.enqueue djob, opts