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Fatal error: Uncaught TypeError: array_filter(): Argument #1 ($array) must be of type array, bool given in /home/dblicken/public_html/pressbooks/wp-content/plugins/pressbooks/themes-book/pressbooks-book/page-cover-top-block.php:60
Stack trace:
#0 /home/dblicken/public_html/pressbooks/wp-content/plugins/pressbooks/themes-book/pressbooks-book/page-cover-top-block.php(60): array_filter(false)
#1 /home/dblicken/public_html/pressbooks/wp-includes/template.php(812): require('/home/dblicken/...')
#2 /home/dblicken/public_html/pressbooks/wp-includes/template.php(745): load_template('/home/dblicken/...', false, Array)
#3 /home/dblicken/public_html/pressbooks/wp-includes/general-template.php(206): locate_template(Array, true, false, Array)
#4 /home/dblicken/public_html/pressbooks/wp-content/plugins/pressbooks/themes-book/pressbooks-book/page-cover.php(9): get_template_part('page-cover', 'top-block')
#5 /home/dblicken/public_html/pressbooks/wp-includes/template-loader.php(106): include('/home/dblicken/...')
#6 /home/dblicken/public_html/pressbooks/wp-blog-header.php(19): require_once('/home/dblicken/...')
#7 /home/dblicken/public_html/pressbooks/index.php(17): require('/home/dblicken/...')
#8 {main}
thrown in
/home/dblicken/public_html/pressbooks/wp-content/plugins/pressbooks/themes-book/pressbooks-book/page-cover-top-block.php on line
60