Fatal Error during install

[laurarosemisaras]

Have CiviCRM 4.7.10 on Civihosting/Wordpress; installed/activated/tested Twilio 1.2.1 extension with SMS messaging-worked well. Installed CiviRules 2.1; downloaded SMS Conversation civicrm-sms-conversation-1.0.0-beta3.zip; placed in extensions folder; decompressed; it showed up in CiviCRM in Extensions. Clicked on install. Received fatal error message -- Mentioned line 15 in the smsconversation.php file:

Fatal error: Call to undefined method Civi::dispatcher()...on line 15

Line 15 of smsconversation.php looks like:
Civi::dispatcher()->addListener('hook_civicrm_post', 'smsconversation_process_inbound',1000);

Disabled and uninstalled extension / deleted files.
Now its back to where it was before we installed SMS Conversation extension.

Any idea what happened? Or how to fix?

[michaelmcandrew]

hi @ laurarosemisaras,

Thanks for the detailed error report. We are relying on some functionality that was added to CiviCRM in 4.7.19 (https://docs.civicrm.org/dev/en/latest/hooks/setup/symfony/). If you upgrade to 4.7.19 or later, you should be able to use the extension.

I've updated the README.md to better reflect the requirements.

[michaelmcandrew]

Let me know if this works for you or not and I will close the issue / investigate further as appropriate.