Title: Unable to activate – PHP extension error
Last modified: March 31, 2017

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# Unable to activate – PHP extension error

 *  Resolved [evancourtney](https://wordpress.org/support/users/evancourtney/)
 * (@evancourtney)
 * [9 years, 2 months ago](https://wordpress.org/support/topic/unable-to-activate-php-extension-error/)
 * Version 3.1.9 Simple Calendar
    PHP 7.0
 * I had the plugin up and going while I was using PHP 5.6. My host then updated
   my PHP to 7.0 and it broke the plugin.
 * Any thoughts on how I can get it to activate?

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Contributor [Nick Young](https://wordpress.org/support/users/nickyoung87/)
 * (@nickyoung87)
 * [9 years, 2 months ago](https://wordpress.org/support/topic/unable-to-activate-php-extension-error/#post-8993025)
 * Is it for sure PHP 7.0 or is it PHP 7.1?
 * I would just go through general troubleshooting steps: [https://docs.simplecalendar.io/troubleshooting-theme-plugin-widget-conflicts/](https://docs.simplecalendar.io/troubleshooting-theme-plugin-widget-conflicts/)
 * You might also want to just try uninstalling (make sure you keep the save settings
   option enabled) and re-installing if there are major issues.
 *  Thread Starter [evancourtney](https://wordpress.org/support/users/evancourtney/)
 * (@evancourtney)
 * [9 years, 2 months ago](https://wordpress.org/support/topic/unable-to-activate-php-extension-error/#post-8993757)
 * PHP 7.0.17
 * I deleted and reinstalled the plugin.
 * I have switched to a default theme, deactivated all plugins and remove all widgets.
 * The plugin won’t activate and gives me the error of:
 * Simple Calendar could not be activated.
    Required PHP Extension(s) not found:
   iconv, mbstring. Please update to meet Simple Calendar requirements.
 *  Thread Starter [evancourtney](https://wordpress.org/support/users/evancourtney/)
 * (@evancourtney)
 * [9 years, 2 months ago](https://wordpress.org/support/topic/unable-to-activate-php-extension-error/#post-8993764)
 * It is across the board on the server. All of my Simple Calendar installs aren’t
   working now.
 * It was working in the PHP 5.6 environment but now not in the PHP 7.0.17
 *  Plugin Contributor [Nick Young](https://wordpress.org/support/users/nickyoung87/)
 * (@nickyoung87)
 * [9 years, 1 month ago](https://wordpress.org/support/topic/unable-to-activate-php-extension-error/#post-9067339)
 * > Required PHP Extension(s) not found: iconv, mbstring.
   >  Please update to meet
   > Simple Calendar requirements.
 * You need to enable those extensions then for it to work.
 * Additionally here you can see all the requirements: [https://docs.simplecalendar.io/system-requirements/](https://docs.simplecalendar.io/system-requirements/)

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Unable to activate – PHP extension error’ is closed to new replies.

 * ![](https://ps.w.org/google-calendar-events/assets/icon-256x256.png?rev=1263960)
 * [Simple Calendar - Google Calendar Plugin](https://wordpress.org/plugins/google-calendar-events/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/google-calendar-events/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/google-calendar-events/)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/google-calendar-events/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/google-calendar-events/reviews/)

 * 4 replies
 * 2 participants
 * Last reply from: [Nick Young](https://wordpress.org/support/users/nickyoung87/)
 * Last activity: [9 years, 1 month ago](https://wordpress.org/support/topic/unable-to-activate-php-extension-error/#post-9067339)
 * Status: resolved