Notice: Undefined index

After installing this plugin I am now getting this error message on all pages in the admin:

Notice: Undefined index: options in ~/includes/library/lib_route.inc.php (Line 47)

This add-on was made for LiteCart 1.x and has been replaced by News Articles.
I granted you a license for News Articles free of cost.

Thank you very much Tim. After installing News Articles, I got the following error on the frontend:

Warning: Modification "News Articles" failed during operation #1 in includes/templates/minimo.catalog/views/box_site_menu.inc.php: Search not found in ~/includes/library/lib_vmod.inc.php (Line 210) Warning: Modification "News Articles" failed during operation #1 in includes/templates/minimo.catalog/views/box_site_menu.inc.php: Search not found in ~/includes/library/lib_vmod.inc.php (Line 210)

Please help.

Going directly into news_articles gives me the error:

Fatal error: 1525 - Incorrect TIMESTAMP value: '1970' select n.id, date_format(if(n.date_valid_from > '1970', n.date_valid_from, n.date_created), '%Y-%m') as month from news_articles n left join news_articles_info ni on (n.id = ni.article_id and ni.language_code = 'en') where n.status and ni.preamble != '' and (n.date_valid_from is null or n.date_valid_from = '2024-03-08 12:56:11') order by if(n.date_valid_from > '1970', n.date_valid_from, n.date_created) desc; in ~/includes/library/lib_database.inc.php (Line 177)

I have modified vmod to suit my theme and warning is now gone except for this:

Fatal error: 1525 - Incorrect TIMESTAMP value: '1970' select n.id, date_format(if(n.date_valid_from > '1970', n.date_valid_from, n.date_created), '%Y-%m') as month from news_articles n left join news_articles_info ni on (n.id = ni.article_id and ni.language_code = 'en') where n.status and ni.preamble != '' and (n.date_valid_from is null or n.date_valid_from = '2024-03-08 12:56:11') order by if(n.date_valid_from > '1970', n.date_valid_from, n.date_created) desc; in ~/includes/library/lib_database.inc.php (Line 177)

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