Warning: count(): Parameter must be an array or an object that implements …

  • Hello, can someone help with the following issue?

    When I open my website https://www.tourism-student-conference.com the following warning message appears x-times above the website content:

    Warning: count(): Parameter must be an array or an object that implements Countable in /home/.sites/580/site600/web/Iscontour/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/fs/package.module.fs.php on line 263

    I tried to log on to my WordPress CMS but the pass word does not work anymore and even on the login-page I get these warning message. Password reset does not work either.

    What needs to be done to get rid of these warning lines?

    Thanks in advance,

    Christian

    The page I need help with: [log in to see the link]

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