Title: wordpress errors, template.php ans script-loader.php
Last modified: August 20, 2016

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# wordpress errors, template.php ans script-loader.php

 *  [ibby1001](https://wordpress.org/support/users/ibby1001/)
 * (@ibby1001)
 * [14 years, 2 months ago](https://wordpress.org/support/topic/wordpress-errors-templatephp-ans-script-loaderphp/)
 * is_a(): Deprecated. Please use the instanceof operator at /wp-includes/script-
   loader.php (725)
    Declaration of Walker_Category_Checklist::start_lvl() should
   be compatible with that of Walker::start_lvl() at /wp-admin/includes/template.
   php (52)

Viewing 1 replies (of 1 total)

 *  [Clayton James](https://wordpress.org/support/users/claytonjames/)
 * (@claytonjames)
 * [14 years, 2 months ago](https://wordpress.org/support/topic/wordpress-errors-templatephp-ans-script-loaderphp/#post-2506835)
 * Did this happen right after activating a new plugin or upgrading and old one?

Viewing 1 replies (of 1 total)

The topic ‘wordpress errors, template.php ans script-loader.php’ is closed to new
replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 1 reply
 * 2 participants
 * Last reply from: [Clayton James](https://wordpress.org/support/users/claytonjames/)
 * Last activity: [14 years, 2 months ago](https://wordpress.org/support/topic/wordpress-errors-templatephp-ans-script-loaderphp/#post-2506835)
 * Status: not resolved

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