Uncaught Error: Call to undefined function twentytwenty_the_post_meta()

I’m working with WordPress customization, I created a template who has the following code

I used this template in “Test” page it was working correctly before I removed “Test” page text and add a new one, after adding new text it is showing fatal error. I don’t know why it is throwing this error. I tried to remove new added text(added from elementor) and also remove body code but still getting same error.

Error:

Fatal error: Uncaught Error: Call to undefined function
twentytwenty_the_post_meta() in
/nas/content/live/betterworldstg/wp-content/themes/twentytwenty/template-parts/entry-header.php:70
Stack trace: #0
/nas/content/live/betterworldstg/wp-includes/template.php(725):
require() #1
/nas/content/live/betterworldstg/wp-includes/template.php(672):
load_template(‘/nas/content/li…’, false) #2
/nas/content/live/betterworldstg/wp-includes/general-template.php(168):
locate_template(Array, true, false) #3
/nas/content/live/betterworldstg/wp-content/themes/twentytwenty/template-parts/content.php(20):
get_template_part(‘template-parts/…’) #4
/nas/content/live/betterworldstg/wp-includes/template.php(725):
require(‘/nas/content/li…’) #5
/nas/content/live/betterworldstg/wp-includes/template.php(672):
load_template(‘/nas/content/li…’, false) #6
/nas/content/live/betterworldstg/wp-includes/general-template.php(168):
locate_template(Array, true, false) #7
/nas/content/live/betterworldstg/wp-content/themes/twentytwenty/singular.php(24
in
/nas/content/live/betterworldstg/wp-content/themes/twentytwenty/template-parts/entry-header.php
on line 70

Please help me.