Title: Activation error
Last modified: August 31, 2016

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# Activation error

 *  [yale_itg](https://wordpress.org/support/users/yale_itg/)
 * (@yale_itg)
 * [10 years, 5 months ago](https://wordpress.org/support/topic/activation-error-56/)
 * I recently used CAS Maestro on another 4.5.2 site without issue but here: dev.
   gotocanvas.pantheon.io activating the plugin triggers the following:
 * Plugin could not be activated because it triggered a fatal error.
    Warning: session_start():
   user session functions not defined in /srv/bindings/438a73d722e14362926af315dbf7ef9b/
   code/wp-content/plugins/cas-maestro/cas-maestro.php on line 107 Fatal error: 
   session_start(): Failed to initialize storage module: user (path: ) in /srv/bindings/
   438a73d722e14362926af315dbf7ef9b/code/wp-content/plugins/cas-maestro/cas-maestro.
   php on line 107
 * Any help would be appreciated.
    Pam
 * [https://wordpress.org/plugins/cas-maestro/](https://wordpress.org/plugins/cas-maestro/)

 The topic ‘Activation error’ is closed to new replies.

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 * 0 replies
 * 1 participant
 * Last reply from: [yale_itg](https://wordpress.org/support/users/yale_itg/)
 * Last activity: [10 years, 5 months ago](https://wordpress.org/support/topic/activation-error-56/)
 * Status: not resolved