Upgrading PHP 7.3 to 8.0

I’m trying to upgrade our server from PHP 7.3 to 8.0, which treats what used to be warnings as errors. The error I’m getting is

Fatal error: Uncaught TypeError: method_exists(): Argument #1 ($object_or_class) must be of type object|string, null given in /var/app/current/wp-content/plugins/embed-any-document/awsm-embed.php:179

This is when I edit a page. I believe it has some interplay with the plugin Advanced Custom Fields. The particular page uses a block that contains a ACF repeater, of which inside contains ACF Image (it’s a slideshow block that we created).

I believe it’s because at here
$screen = get_current_screen();
It will return a null sometimes, so method_exists( $screen, ‘is_block_editor’ ) will barf. Simplest fix would be to check for null before doing method_exists()

The full stack trace is below

Stack Trace
1.	
method_exists(NULL, 'is_block_editor')
/var/app/current/wp-content/plugins/embed-any-document/awsm-embed.php:179
2.	
Awsm_embed->embed_helper('')
/var/app/current/wp-includes/class-wp-hook.php:292
3.	
WP_Hook->apply_filters('', Array)
/var/app/current/wp-includes/class-wp-hook.php:316
4.	
WP_Hook->do_action(Array)
/var/app/current/wp-includes/plugin.php:484
5.	
do_action('wp_enqueue_medi...')
/var/app/current/wp-includes/media.php:4537
6.	
wp_enqueue_media()
/var/app/current/wp-content/plugins/advanced-custom-fields-pro/includes/assets.php:301
7.	
ACF_Assets->enqueue_uploader()
/var/app/current/wp-content/plugins/advanced-custom-fields-pro/includes/assets.php:603
8.	
acf_enqueue_uploader()
/var/app/current/wp-content/plugins/advanced-custom-fields-pro/includes/fields/class-acf-field-link.php:104
9.	
acf_field_link->render_field(Array)
/var/app/current/wp-includes/class-wp-hook.php:292
10.	
WP_Hook->apply_filters('', Array)
/var/app/current/wp-includes/class-wp-hook.php:316
11.	
WP_Hook->do_action(Array)
/var/app/current/wp-includes/plugin.php:551
12.	
do_action_ref_array('acf/render_fiel...', Array)
/var/app/current/wp-content/plugins/advanced-custom-fields-pro/includes/acf-hook-functions.php:105
13.	
_acf_apply_hook_variations(Array)
/var/app/current/wp-includes/class-wp-hook.php:292
14.	
WP_Hook->apply_filters('', Array)
/var/app/current/wp-includes/class-wp-hook.php:316
15.	
WP_Hook->do_action(Array)
/var/app/current/wp-includes/plugin.php:484
16.	
do_action('acf/render_fiel...', Array)
/var/app/current/wp-content/plugins/advanced-custom-fields-pro/includes/acf-field-functions.php:784
17.	
acf_render_field(Array)
/var/app/current/wp-content/plugins/advanced-custom-fields-pro/includes/acf-field-functions.php:744
18.	
acf_render_field_wrap(Array, 'div')
/var/app/current/wp-content/plugins/advanced-custom-fields-pro/pro/fields/class-acf-field-repeater.php:330
19.	
acf_field_repeater->render_field(Array)
/var/app/current/wp-includes/class-wp-hook.php:292
20.	
WP_Hook->apply_filters('', Array)
/var/app/current/wp-includes/class-wp-hook.php:316
21.	
WP_Hook->do_action(Array)
/var/app/current/wp-includes/plugin.php:551
22.	
do_action_ref_array('acf/render_fiel...', Array)
/var/app/current/wp-content/plugins/advanced-custom-fields-pro/includes/acf-hook-functions.php:105
23.	
_acf_apply_hook_variations(Array)
/var/app/current/wp-includes/class-wp-hook.php:292
24.	
WP_Hook->apply_filters('', Array)
/var/app/current/wp-includes/class-wp-hook.php:316
25.	
WP_Hook->do_action(Array)
/var/app/current/wp-includes/plugin.php:484
26.	
do_action('acf/render_fiel...', Array)
/var/app/current/wp-content/plugins/advanced-custom-fields-pro/includes/acf-field-functions.php:784
27.	
acf_render_field(Array)
/var/app/current/wp-content/plugins/advanced-custom-fields-pro/includes/acf-field-functions.php:744
28.	
acf_render_field_wrap(Array, 'div', 'field')
/var/app/current/wp-content/plugins/advanced-custom-fields-pro/includes/acf-field-functions.php:603
29.	
acf_render_fields(Array, 'block_609170948...', 'div', 'field')
/var/app/current/wp-content/plugins/advanced-custom-fields-pro/pro/blocks.php:594
30.	
acf_ajax_fetch_block('')
/var/app/current/wp-includes/class-wp-hook.php:292
31.	
WP_Hook->apply_filters('', Array)
/var/app/current/wp-includes/class-wp-hook.php:316
32.	
WP_Hook->do_action(Array)
/var/app/current/wp-includes/plugin.php:484
33.	
do_action('wp_ajax_acf/aja...')
/var/app/current/wp-admin/admin-ajax.php:187
34.	
{main}
thrown in /var/app/current/wp-content/plugins/embed-any-document/awsm-embed.php on line 179