Hey Armin I have fixed this. I deleted the page with the project list mentioned in the error details :)

It says that 'the theme is broken'. I have tried reinstalling Laytheme with a fresh copy but this did not help either

Hi Armin

I am also having this problem. I noticed the site was broken the other day, I believe wordpress may have updated automatically so I tried downgrading to an earlier version but this didn't fix it. I have tried disabling plugins/css but it doesn't help. Here's the info:

Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

In this case, WordPress caught an error with your theme, Lay Theme.

First, visit your website (https://dossierindustries.co/) and check for any visible issues. Next, visit the page where the error was caught (https://dossierindustries.co/wp-admin/edit.php?post_type=page) and check for any visible issues.

Please contact your host for assistance with investigating this issue further.

If your site appears broken and you can't access your dashboard normally, WordPress now has a special "recovery mode". This lets you safely login to your dashboard and investigate further.

https://dossierindustries.co/wp-login.php?action=enter_recovery_mode&rm_token=a6yOGpzitqpiX97b7bOrqb&rm_key=5BkhtKwCbj3rKTCgERhFEy

To keep your site safe, this link will expire in 1 day. Don't worry about that, though: a new link will be emailed to you if the error occurs again after it expires.

When seeking help with this issue, you may be asked for some of the following information:
WordPress version 6.8.1
Active theme: Lay Theme (version 9.0.9)
Current plugin: (version )
PHP version 8.1.32

Error Details

An error of type E_ERROR was caused in line 297 of the file /home/userdossier/public_html/wp-content/themes/lay/setup/setup.php. Error message: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, string given in /home/userdossier/public_html/wp-content/themes/lay/setup/setup.php:297
Stack trace:
#0 /home/userdossier/public_html/wp-includes/class-wp-hook.php(324): Setup->add_to_page_and_post_title_in_admin_overview()
#1 /home/userdossier/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters()
#2 /home/userdossier/public_html/wp-admin/includes/template.php(2350): apply_filters()
#3 /home/userdossier/public_html/wp-admin/includes/template.php(2251): get_post_states()
#4 /home/userdossier/public_html/wp-admin/includes/class-wp-posts-list-table.php(1156): _post_states()
#5 /home/userdossier/public_html/wp-admin/includes/class-wp-posts-list-table.php(1077): WP_Posts_List_Table->column_title()
#6 /home/userdossier/public_html/wp-admin/includes/class-wp-list-table.php(1793): WP_Posts_List_Table->_column_title()
#7 /home/userdossier/public_html/wp-admin/includes/class-wp-posts-list-table.php(1444): WP_List_Table->single_row_columns()
#8 /home/userdossier/public_html/wp-admin/includes/class-wp-posts-list-table.php(941): WP_Posts_List_Table->single_row()
#9 /home/userdossier/public_html/wp-admin/includes/class-wp-posts-list-table.php(813): WP_Posts_List_Table->_display_rows_hierarchical()
#10 /home/userdossier/public_html/wp-admin/includes/class-wp-list-table.php(1712): WP_Posts_List_Table->display_rows()
#11 /home/userdossier/public_html/wp-admin/includes/class-wp-list-table.php(1639): WP_List_Table->display_rows_or_placeholder()
#12 /home/userdossier/public_html/wp-admin/edit.php(503): WP_List_Table->display()
#13 {main}
thrown

Hope you can help, many thanks for your great work with this theme!