Wordpress error - PHP Fatal error: Uncaught Error: Call to undefined function register_block_type_from_metadata()

Question

I'm working on a website that has been met with the WordPress "white screen of death" error, 'The site is experiencing technical difficulties.'

I believe this occurred when updating all plugins, I have tried disabling all plugins of the website (by renaming the /wp-content/plugins to /wp-content/plugins.hold), but that did not work. I did the same with disabling the used theme but got the same result.

So after enabling debugging and looking through the debug.log, I have found this error:

PHP Fatal error: Uncaught Error: Call to undefined function register_block_type_from_metadata() in /home/uni19047/public_html/udu.com.au/wp-includes/blocks/archives.php:119

I am not sure what is causing this and I would really appreciate any help in this.

Here's the full log.

[28-Sep-2020 16:34:36 UTC] PHP Warning:  include_once(/home/uni19047/public_html/udu.com.au/wp-content/plugins/wp-super-cache/wp-cache-phase1.php): failed to open stream: No such file or directory in /home/uni19047/public_html/udu.com.au/wp-content/advanced-cache.php on line 22
[28-Sep-2020 16:34:36 UTC] PHP Warning:  include_once(): Failed opening '/home/uni19047/public_html/udu.com.au/wp-content/plugins/wp-super-cache/wp-cache-phase1.php' for inclusion (include_path='.:/opt/alt/php71/usr/share/pear') in /home/uni19047/public_html/udu.com.au/wp-content/advanced-cache.php on line 22
[28-Sep-2020 16:34:36 UTC] PHP Notice:  The called constructor method for WP_Widget in Roots_Vcard_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /home/uni19047/public_html/udu.com.au/wp-includes/functions.php on line 4503
[28-Sep-2020 16:34:36 UTC] PHP Warning:  include_once(/home/uni19047/public_html/udu.com.au/wp-content/plugins/wp-super-cache/wp-cache-phase1.php): failed to open stream: No such file or directory in /home/uni19047/public_html/udu.com.au/wp-content/advanced-cache.php on line 22
[28-Sep-2020 16:34:36 UTC] PHP Warning:  include_once(): Failed opening '/home/uni19047/public_html/udu.com.au/wp-content/plugins/wp-super-cache/wp-cache-phase1.php' for inclusion (include_path='.:/opt/alt/php71/usr/share/pear') in /home/uni19047/public_html/udu.com.au/wp-content/advanced-cache.php on line 22
[28-Sep-2020 16:34:37 UTC] PHP Notice:  The called constructor method for WP_Widget in Roots_Vcard_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /home/uni19047/public_html/udu.com.au/wp-includes/functions.php on line 4503
[28-Sep-2020 16:34:37 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function register_block_type_from_metadata() in /home/uni19047/public_html/udu.com.au/wp-includes/blocks/archives.php:119
Stack trace:
#0 /home/uni19047/public_html/udu.com.au/wp-includes/class-wp-hook.php(286): register_block_core_archives('')
#1 /home/uni19047/public_html/udu.com.au/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#2 /home/uni19047/public_html/udu.com.au/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#3 /home/uni19047/public_html/udu.com.au/wp-settings.php(525): do_action('init')
#4 /home/uni19047/public_html/udu.com.au/wp-config.php(114): require_once('/home/uni19047/...')
#5 /home/uni19047/public_html/udu.com.au/wp-load.php(37): require_once('/home/uni19047/...')
#6 /home/uni19047/public_html/udu.com.au/wp-cron.php(39): require_once('/home/uni19047/...')
#7 {main}
  thrown in /home/uni19047/public_html/udu.com.au/wp-includes/blocks/archives.php on line 119
[28-Sep-2020 16:34:37 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function register_block_type_from_metadata() in /home/uni19047/public_html/udu.com.au/wp-includes/blocks/archives.php:119
Stack trace:
#0 /home/uni19047/public_html/udu.com.au/wp-includes/class-wp-hook.php(286): register_block_core_archives('')
#1 /home/uni19047/public_html/udu.com.au/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#2 /home/uni19047/public_html/udu.com.au/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#3 /home/uni19047/public_html/udu.com.au/wp-settings.php(525): do_action('init')
#4 /home/uni19047/public_html/udu.com.au/wp-config.php(114): require_once('/home/uni19047/...')
#5 /home/uni19047/public_html/udu.com.au/wp-load.php(37): require_once('/home/uni19047/...')
#6 /home/uni19047/public_html/udu.com.au/wp-blog-header.php(13): require_once('/home/uni19047/...')
#7 /home/uni19047/public_html/udu.com.au/index.php(17): require('/home/uni19047/...')
#8 {main}
  thrown in /home/uni19047/public_html/udu.com.au/wp-includes/blocks/archives.php on line 119
[28-Sep-2020 16:34:45 UTC] PHP Warning:  include_once(/home/uni19047/public_html/udu.com.au/wp-content/plugins/wp-super-cache/wp-cache-phase1.php): failed to open stream: No such file or directory in /home/uni19047/public_html/udu.com.au/wp-content/advanced-cache.php on line 22
[28-Sep-2020 16:34:45 UTC] PHP Warning:  include_once(): Failed opening '/home/uni19047/public_html/udu.com.au/wp-content/plugins/wp-super-cache/wp-cache-phase1.php' for inclusion (include_path='.:/opt/alt/php71/usr/share/pear') in /home/uni19047/public_html/udu.com.au/wp-content/advanced-cache.php on line 22
[28-Sep-2020 16:34:45 UTC] PHP Notice:  The called constructor method for WP_Widget in Roots_Vcard_Widget is <strong>deprecated</strong> since version 4.3.0! Use <pre>__construct()</pre> instead. in /home/uni19047/public_html/udu.com.au/wp-includes/functions.php on line 4503
[28-Sep-2020 16:34:45 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function register_block_type_from_metadata() in /home/uni19047/public_html/udu.com.au/wp-includes/blocks/archives.php:119
Stack trace:
#0 /home/uni19047/public_html/udu.com.au/wp-includes/class-wp-hook.php(286): register_block_core_archives('')
#1 /home/uni19047/public_html/udu.com.au/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#2 /home/uni19047/public_html/udu.com.au/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#3 /home/uni19047/public_html/udu.com.au/wp-settings.php(525): do_action('init')
#4 /home/uni19047/public_html/udu.com.au/wp-config.php(114): require_once('/home/uni19047/...')
#5 /home/uni19047/public_html/udu.com.au/wp-load.php(37): require_once('/home/uni19047/...')
#6 /home/uni19047/public_html/udu.com.au/wp-blog-header.php(13): require_once('/home/uni19047/...')
#7 /home/uni19047/public_html/udu.com.au/index.php(17): require('/home/uni19047/...')
#8 {main}
  thrown in /home/uni19047/public_html/udu.com.au/wp-includes/blocks/archives.php on line 119

And I am using cPanel for this.

Please do give me some guidance on how to fix this, thanks very much.

Answer 1

What comes to my mind is that You should check Your wp-settings.php file, as it should include wp-includes/blocks.php file where "register_block_type_from_metadata" function is defined

check that file for this line of code:

require ABSPATH . WPINC . '/blocks.php';

if its not there, then Your wordpress installation could have been either hacked or interupted while updating

As We find Out, register_block_type_from_metadata function definition was missing in blocks.php file, due to wordpress update interuption. Replacing that file with the original version fixes the problem