Getting a Fatal error when trying to activate

  • Hello I am getting a fatal error when trying to activate

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

    Fatal error: Call to undefined method scbAdminPage::register() in …/plugins/wp-useronline/wp-useronline.php on line 83

    I tried to uninstall pagenavi but that didn’t help.
    Any solutions for this one.

    WP 3.5 Multisite and I have several of your plugins installed but not all active on the site I am trying to activate WP-Useronline on.

    https://www.ads-software.com/extend/plugins/wp-useronline/

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  • HELLO GOOD MORNING …

    When I install the WP-UserOnline Appears THIS ERROR … “Warning: array_merge () [function.array-merge]: Argument # 2 is not an array in / home / control / public_html / wp-content / plugins / wp-UserOnline / scb / options.php on line 44

    Warning: array_merge () [function.array-merge]: Argument # 2 is not an array in / home / control / public_html / wp-content / plugins / wp-UserOnline / scb / options.php on line 44 “

    How to Proceed?

    I use WordPress Stats BETWEEN THEM AND Incompatibility?

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