Double Opt-In for Download
Double Opt In For Download Issue (1 post)

  1. amuschette
    Posted 1 year ago #

    Trying to activate the "Double Opt-in" For Download" plugin, but I keep receiving this message:

    I am trying to activate the Double Opt In For Download plugin. After successful installation, i have tried to activate the plugin, but continue to get the following message:

    Plugin could not be activated because it triggered a fatal error.

    Fatal error: Cannot redeclare upgrade_all() (previously declared in /homepages/13/d376116902/htdocs/wordpress-3.3/wordpress-Backup/wp-admin/includes/upgrade.php:331) in /homepages/13/d376116902/htdocs/wordpress-3.3/wordpress-Backup/wp-admin/includes/upgrade.php on line 414

    Please advise.

    Thank you!


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  • Started 1 year ago by amuschette
  • This topic is not a support question
  • WordPress version: 3.7.1