Title: Error: Cannot start the scan
Last modified: January 20, 2018

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# Error: Cannot start the scan

 *  [Liew Cheon-Fong](https://wordpress.org/support/users/lcf/)
 * (@lcf)
 * [8 years, 5 months ago](https://wordpress.org/support/topic/error-cannot-start-the-scan/)
 * Cannot start Ninjascanner…
 * > Error: Cannot start the scan. More details may be available in the scanner 
   > log.
 * In the scanner log…
 * > 20-Jan-18 09:31:33 INFO Scheduling a scanning process
   >  20-Jan-18 09:31:35 ERROR
   > Fatal error: scheduled task failed (spawn_cron). More details may be available
   > in your server HTTP log. Aborting 20-Jan-18 09:31:35 INFO Cancelling scanning
   > process
 * In my server HTTP log…
 * > xxx.xxx.xxx.xxx – – [20/Jan/2018:17:37:10 +0800] “POST /wp-admin/admin.php?
   > page=NinjaScanner&nscantab=summary HTTP/1.0” 200 29681 “[https://domain.my/wp-admin/admin.php?page=NinjaScanner&nscantab=summary&#8221](https://domain.my/wp-admin/admin.php?page=NinjaScanner&nscantab=summary&#8221);“
   > Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/
   > 63.0.3239.132 Safari/537.36 OPR/50.0.2762.58”
   >  xxx.xxx.xxx.xxx – – [20/Jan/
   > 2018:17:37:13 +0800] “GET /wp-admin/load-styles.php?c=0&dir=ltr&load%5B%5D=
   > dashicons,admin-bar,wp-jquery-ui-dialog,common,forms,admin-menu,dashboard,list-
   > tables,edit,revisions,media,themes,about,nav-menu&load%5B%5D=s,wp-pointer,widgets,
   > site-icon,l10n,buttons,wp-auth-check&ver=4.9.2 HTTP/1.0” 200 84787 “[https://domain.my/wp-admin/admin.php?page=NinjaScanner&nscantab=summary&#8221](https://domain.my/wp-admin/admin.php?page=NinjaScanner&nscantab=summary&#8221);“
   > Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/
   > 63.0.3239.132 Safari/537.36 OPR/50.0.2762.58”
 * Any idea? Thanks
    -  This topic was modified 8 years, 5 months ago by [Liew Cheon-Fong](https://wordpress.org/support/users/lcf/).

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [nintechnet](https://wordpress.org/support/users/nintechnet/)
 * (@nintechnet)
 * [8 years, 5 months ago](https://wordpress.org/support/topic/error-cannot-start-the-scan/#post-9884376)
 * Search for the line containing `POST /wp-cron.php?doing_wp_cron...` right before
   the `POST /wp-admin/admin.php?page=NinjaScanner...` request.
    Alternatively, 
   download the new settings page from the trunk folder, it contains a diagnostics
   tool: 1. Make sure you are running NinjaScanner 1.0.5, or update it. 2. Download
   this file: [https://plugins.trac.wordpress.org/export/HEAD/ninjascanner/trunk/lib/tab_settings.php](https://plugins.trac.wordpress.org/export/HEAD/ninjascanner/trunk/lib/tab_settings.php)
   3. Save it to your “/wp-content/plugins/ninjascanner/lib/” and replace the current
   one with it. 4. Log in to WordPress and click on “NinjaScanner > Settings > Advanced
   Users Settings > Nerds Settings > Debugging > Run diagnostics”.
 *  [xaver06](https://wordpress.org/support/users/xaver06/)
 * (@xaver06)
 * [8 years, 4 months ago](https://wordpress.org/support/topic/error-cannot-start-the-scan/#post-9913533)
 * It’s the same here, too. When running under the Nerds Setings the Diagnosic, 
   I’ll get back the following: “Error: The server returned the following HTTP code:
   401”, nothing more.
    Any advice?
 *  Plugin Author [nintechnet](https://wordpress.org/support/users/nintechnet/)
 * (@nintechnet)
 * [8 years, 4 months ago](https://wordpress.org/support/topic/error-cannot-start-the-scan/#post-9913971)
 * “HTTP 401” is the “Unauthorized error” which means that you need authentication(
   login + password) to access a page. NinjaScanner calls the “wp-cron.php” script.
   Did you password-protect it?

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Error: Cannot start the scan’ is closed to new replies.

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 * 3 replies
 * 3 participants
 * Last reply from: [nintechnet](https://wordpress.org/support/users/nintechnet/)
 * Last activity: [8 years, 4 months ago](https://wordpress.org/support/topic/error-cannot-start-the-scan/#post-9913971)
 * Status: not a support question