wordpress core file says error template.php

General Things to do

• Deactive all plugin
• Debug error
• check drbug log file
• Chnage Theme such as Twenty Twenty One

Above lists Still Error shown in Customimazie Appearance in Theme

DO you know how to take out all massage or fix?

Thanks

Above error code is here

I can not edit post page right now!!! Edit Post Page Screen is ALL white.

/**
 * Retrieves an array of post states from a post.
 *
 * @since 5.3.0
 *
 * @param WP_Post $post The post to retrieve states for.
 * @return string[] Array of post state labels keyed by their state.
 */
function get_post_states( $post ) {
	$post_states = array();

	if ( isset( $_REQUEST['post_status'] ) ) {
		$post_status = $_REQUEST['post_status'];
	} else {
		$post_status="";
	}

	if ( ! empty( $post->post_password ) ) {
		$post_states['protected'] = _x( 'Password protected', 'post status' );
	}

	if ( 'private' === $post->post_status && 'private' !== $post_status ) {
		$post_states['private'] = _x( 'Private', 'post status' );
	}

	if ( 'draft' === $post->post_status ) {
		if ( get_post_meta( $post->ID, '_customize_changeset_uuid', true ) ) {
			$post_states[] = __( 'Customization Draft' );
		} elseif ( 'draft' !== $post_status ) {
			$post_states['draft'] = _x( 'Draft', 'post status' );
		}
	} elseif ( 'trash' === $post->post_status && get_post_meta( $post->ID, '_customize_changeset_uuid', true ) ) {
		$post_states[] = _x( 'Customization Draft', 'post status' );
	}

	if ( 'pending' === $post->post_status && 'pending' !== $post_status ) {
		$post_states['pending'] = _x( 'Pending', 'post status' );
	}

	if ( is_sticky( $post->ID ) ) {
		$post_states['sticky'] = _x( 'Sticky', 'post status' );
	}

	if ( 'future' === $post->post_status ) {
		$post_states['scheduled'] = _x( 'Scheduled', 'post status' );
	}

	if ( 'page' === get_option( 'show_on_front' ) ) {
		if ( (int) get_option( 'page_on_front' ) === $post->ID ) {
			$post_states['page_on_front'] = _x( 'Front Page', 'page label' );
		}

		if ( (int) get_option( 'page_for_posts' ) === $post->ID ) {
			$post_states['page_for_posts'] = _x( 'Posts Page', 'page label' );
		}
	}

	if ( (int) get_option( 'wp_page_for_privacy_policy' ) === $post->ID ) {
		$post_states['page_for_privacy_policy'] = _x( 'Privacy Policy Page', 'page label' );
	}
Trying to get property 'post_status' of non-object　

• This reply was modified 9 hours, 6 minutes ago by kazskater99.
• This reply was modified 9 hours, 1 minute ago by kazskater99.

If all plugins are deactivated and a standard theme is activated, the message is probably caused by an incomplete and/or incorrect data record in the database. It is difficult to say which one this is. You could take a look at which data records you can edit in the backend (pages, posts) and whether anything is displayed incorrectly there.

Since the messages are “only” notices and not real errors, you could also ignore them by deactivating the error output in wp-config.php.

I just backed up date so i can edit post　no white page come up.

but still template error shown hopefully wait for proper wordpress version