Order Split Problem

I have been using this plugin for a long time. It’s not working anymore right now. It gives error.

My error log:

[15-Mar-2022 14:07:14 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4273
[15-Mar-2022 14:07:20 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4273
[15-Mar-2022 14:07:46 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4273
[15-Mar-2022 14:08:09 UTC] PHP Notice:  Trying to get property 'ID' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4121
[15-Mar-2022 14:08:09 UTC] PHP Notice:  Trying to get property 'post_title' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4123
[15-Mar-2022 14:08:09 UTC] PHP Notice:  Trying to get property 'post_name' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4125
[15-Mar-2022 14:08:09 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4273
[15-Mar-2022 14:08:32 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4273
[15-Mar-2022 14:09:08 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4273
[15-Mar-2022 14:09:13 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4273
[15-Mar-2022 14:09:21 UTC] PHP Notice:  Trying to get property 'ID' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4121
[15-Mar-2022 14:09:21 UTC] PHP Notice:  Trying to get property 'post_title' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4123
[15-Mar-2022 14:09:21 UTC] PHP Notice:  Trying to get property 'post_name' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4125
[15-Mar-2022 14:09:21 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4273
[15-Mar-2022 14:09:37 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4273
[15-Mar-2022 14:09:53 UTC] PHP Notice:  Trying to get property 'ID' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4121
[15-Mar-2022 14:09:53 UTC] PHP Notice:  Trying to get property 'post_title' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4123
[15-Mar-2022 14:09:53 UTC] PHP Notice:  Trying to get property 'post_name' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4125
[15-Mar-2022 14:09:53 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4273
[15-Mar-2022 14:10:37 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4273
[15-Mar-2022 14:10:47 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4273
[15-Mar-2022 14:11:26 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /home/admin/public_html/wp-includes/class-wp-query.php on line 4273

Can you help me?