Activation Error when using PHP 7.2

[nathan-4web]

Activating the plugin, then return to the plugin list page has this at the top:

Fatal error: Uncaught Error: [] operator not supported for strings in /wp-content/plugins/widget-options/includes/install.php:29 Stack trace:

0 /wp-includes/class-wp-hook.php(288): widgetopts_filter_plugin_actions('<')

1 /wp-includes/plugin.php(203): WP_Hook->apply_filters('<', Array)

2 /wp-admin/includes/class-wp-plugins-list-table.php(714): apply_filters('plugin_action_l...', '<', 'widget-options/...', Array, 'all')

3 /wp-admin/includes/class-wp-plugins-list-table.php(534): WP_Plugins_List_Table->single_row(Array)

4 /wp-admin/includes/class-wp-list-table.php(1165): WP_Plugins_List_Table->display_rows()

5 /wp-admin/includes/class-wp-list-table.php(1097): WP_List_Ta in /wp-content/plugins/widget-options/includes/install.php on line 29