E_ERROR on line 122 in AdminNotice.php

Today I’ve just updated the plugin to version 1.8
and the problem is being alive…

When I clicked one of selections for the rating box:
I already did | Nope, maybe later | I don’t want to rate

Following error occurs:

Uncaught TypeError: join(): Argument #2 ($array) must be of type ?array, string given in /www/wordpress/wp-content/plugins/wp-last-modified-info/inc/Base/AdminNotice.php:122
Stack trace:
#0 /www/wordpress/wp-content/plugins/wp-last-modified-info/inc/Base/AdminNotice.php(122): join()
#1 /www/wordpress/wp-includes/class-wp-hook.php(307): Wplmi\Base\AdminNotice->dismiss_notice()
#2 /www/wordpress/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters()
#3 /www/wordpress/wp-includes/plugin.php(474): WP_Hook->do_action()
#4 /www/wordpress/wp-admin/admin.php(175): do_action()
#5 /www/wordpress/wp-admin/options-general.php(10): require_once('...')
#6 {main}
thrown

• This topic was modified 2 years, 9 months ago by gblsm.
• This topic was modified 2 years, 9 months ago by gblsm.
• This topic was modified 2 years, 9 months ago by gblsm.
• This topic was modified 2 years, 9 months ago by gblsm.