Deleted 3 Categories and error appeared on index.php line 27

  • Hello this is what I’m seeing, All i did was remove 3 Categories that were attached to most of my posts and deleted them. I still have Categories left but just deleted 3 ones i did not want to use anymore.

    See the error here:
    https://no2nsa.x10.bz/blog/

    or here:
    Warning: in_array() expects parameter 2 to be array, null given in /home/no2nsax3/public_html/blog/wp-content/themes/Boston/index.php on line 27

    Says line 27 and when i check line 27 it is this:

    <?php while (have_posts()) : the_post(); ?>

    That is on line 27 in my index page, could someone tell me what went wrong or what i can do to fix this problem ??

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