The SPARK External Participant toolkit requires several environemnt variables to be configured in order to work properly. Set these under the Environment tab of your Process App Settings.
bpmServerHostName: The host name of the bpm server that the app uses
bpmServerPort: The port used for accessing tasks and services on your bpm server
bpmServerProtocolScheme: The server protocol (e.g., http, https)
epsAppContextRoot: Web Application context root. The default context root is "bpm-eps"
epsAutoUserPrefix: The prefix to use for randomly generated user ids. e.g., a prefix of EXT would result in user ids in the form EXT123456789
epsDefaulServiceNotificationSubject: Default subject line for notifications regarding services
epsDefaultTaskNotificationSubject: Default subject line for task notifications
epsDefaultValidDuration: Default timeout period for an external user to use a service or complete a task, in seconds (e.g., to set the default validity period to 1 week, set this to 604800)
epsNotifierEmailAddress: Email address notifications should be sent from
epsServiceReqMax: Default maximum number of times a service may be accessed through a single link