several warnings and errors

@abozorgi80

1. Verify that you have set the “Week Starts On” in WP Settings -> General Settings.

2. Try to deactivate the “Smush” plugin to see if there is a conflict with UM.

@abozorgi80

Try to post your Query Monitor screencopy in the “Elementor” plugin support forum and ask for their response about this issue:

https://wordpress.org/support/plugin/elementor/

@abozorgi80

Which version of PHP are you using?

@abozorgi80

You can try this code snippet which will write some tracing results to
.../wp-content/php-errors.log which you can post here in the Forum.

Each time you display a page at your site there will be test data written to this file like this and the last two lines will probably not be equal at your site:

Server LiteSpeed PHP 7.4.33
sunday_start 6
start_of_week 1
week_start 5
week_start_day 1707151741 2024-02-05 17:01
time integer 1707091200 2024-02-05 01:00
time string 1707091200 2024-02-05 01:00

Code snippet:

add_action( 'init', 'mktime_test_um' );

    function mktime_test_um() {
        file_put_contents( WP_CONTENT_DIR . '/php-errors.log', 'Server ' . $_SERVER['SERVER_SOFTWARE'] . ' PHP ' . PHP_VERSION . chr(13), FILE_APPEND );
        $sunday_start   = wp_date( 'w' );
        file_put_contents( WP_CONTENT_DIR . '/php-errors.log', 'sunday_start ' . $sunday_start . chr(13), FILE_APPEND );
        $week_start     = $sunday_start - absint( get_option( 'start_of_week' ) );
        file_put_contents( WP_CONTENT_DIR . '/php-errors.log', 'start_of_week ' . get_option( 'start_of_week' ) . chr(13), FILE_APPEND );
        file_put_contents( WP_CONTENT_DIR . '/php-errors.log', 'week_start ' . $week_start . chr(13), FILE_APPEND );
        $week_start_day = strtotime( '-' . $week_start . ' days' );
        file_put_contents( WP_CONTENT_DIR . '/php-errors.log', 'week_start_day ' . $week_start_day . ' ' . wp_date( 'Y-m-d H:s', $week_start_day ) . chr(13), FILE_APPEND );
        file_put_contents( WP_CONTENT_DIR . '/php-errors.log', 'time integer ', FILE_APPEND );
        $time           = mktime( 0, 0, 0, intval( wp_date( 'm', $week_start_day )), intval( wp_date( 'd', $week_start_day )), intval( wp_date( 'Y', $week_start_day )) );
        file_put_contents( WP_CONTENT_DIR . '/php-errors.log', $time . ' ' . wp_date( 'Y-m-d H:s', $time ) . chr(13), FILE_APPEND );
        file_put_contents( WP_CONTENT_DIR . '/php-errors.log', 'time string ', FILE_APPEND );
        $time           = mktime( 0, 0, 0, wp_date( 'm', $week_start_day ), wp_date( 'd', $week_start_day ), wp_date( 'Y', $week_start_day ) );
        file_put_contents( WP_CONTENT_DIR . '/php-errors.log', $time . ' ' . wp_date( 'Y-m-d H:s', $time ) . chr(13), FILE_APPEND );
    }

Install the code snippet into your active theme’s functions.php file
or use the “Code Snippets” plugin.

https://wordpress.org/plugins/code-snippets/