Warning: Illegal string offset 'maxbutton' in /html/schwimmbrille-test/wp-content/plugins/maxbuttons/blocks/basic.php on line 34

Fatal error: Uncaught Error: Cannot use string offset as an array in /html/schwimmbrille-test/wp-content/plugins/maxbuttons/blocks/basic.php:34 Stack trace: #0 /html/schwimmbrille-test/wp-includes/class-wp-hook.php(298): basicBlock->parse_css('', 'normal') #1 /html/schwimmbrille-test/wp-includes/plugin.php(203): WP_Hook->apply_filters('', Array) #2 /html/schwimmbrille-test/wp-content/plugins/maxbuttons/classes/button.php(339): apply_filters('mb-css-blocks', '', 'normal') #3 /html/schwimmbrille-test/wp-content/plugins/maxbuttons/classes/button.php(482): maxButton->parse_css('normal', false) #4 /html/schwimmbrille-test/wp-content/plugins/maxbuttons/classes/button.php(880): maxButton->display(Array) #5 /html/schwimmbrille-test/wp-content/plugins/maxbuttons/classes/maxbuttons-class.php(502): maxButton->shortcode(Array) #6 /html/schwimmbrille-test/wp-includes/shortcodes.php(345): maxButtonsPlugin->shortcode(Array, '', 'maxbutton') #7 [internal function]: do_shortcode_tag(Array) #8 /html/schwimmbrille-test/wp-includes/shortcode in /html/schwimmbrille-test/wp-content/plugins/maxbuttons/blocks/basic.php on line 34