Title: Call to undefined function str_get_html()
Last modified: March 2, 2022
---
# Call to undefined function str_get_html()
* Resolved [joshuabl](https://wordpress.org/support/users/joshuabl/)
* (@joshuabl)
* [4 years, 3 months ago](https://wordpress.org/support/topic/call-to-undefined-function-str_get_html/)
* I have a fatal error crashing all pages that are using the Ultimate Blocks tabbed
content. Here’s the error it’s throwing:
* `Fatal error: Uncaught Error: Call to undefined function str_get_html() in /home/
562608.cloudwaysapps.com/spkwewzhyq/public_html/wp-content/plugins/ultimate-blocks/
src/blocks/tabbed-content/block.php:36 Stack trace: #0 [internal function]: ub_render_tabbed_content_block()#
1 /home/562608.cloudwaysapps.com/spkwewzhyq/public_html/wp-content/plugins/stackable-
ultimate-gutenberg-blocks-premium/pro__premium_only/src/dynamic-content/init.
php(45): call_user_func() #2 /home/562608.cloudwaysapps.com/spkwewzhyq/public_html/
wp-includes/class-wp-block.php(255): Stackable\DynamicContent\Stackable_Dynamic_Content-
>Stackable\DynamicContent\{closure}() #3 /home/562608.cloudwaysapps.com/spkwewzhyq/
public_html/wp-includes/class-wp-block.php(241): WP_Block->render() #4 /home/
562608.cloudwaysapps.com/spkwewzhyq/public_html/wp-includes/blocks.php(883):
WP_Block->render() #5 /home/562608.cloudwaysapps.com/spkwewzhyq/public_html/wp-
includes/blocks.php(921): render_block() #6 /home/562608.cloudwaysapps.com/spkwewzhyq/
public_html/wp-includes/class in /home/562608.cloudwaysapps.com/spkwewzhyq/public_html/
wp-content/plugins/ultimate-blocks/src/blocks/tabbed-content/block.php on line
36`
* The pages work when I deactivate the Ultimate Blocks. I’ve also cleared all our
site caches and tested for a plugin conflict with Stackable (another blocks plugin)
but that wasn’t the issue.
* Note: The plugin is currently deactivated so the “page I need help with” is working.
* The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fcall-to-undefined-function-str_get_html%2F%3Foutput_format%3Dmd&locale=en_US)
to see the link]_
Viewing 2 replies - 1 through 2 (of 2 total)
* Plugin Contributor [Alexis Pandaan](https://wordpress.org/support/users/alexius08/)
* (@alexius08)
* [4 years, 3 months ago](https://wordpress.org/support/topic/call-to-undefined-function-str_get_html/#post-15420074)
* Hi [@joshuabl](https://wordpress.org/support/users/joshuabl/)! Thanks for letting
us know. We found the cause of the issue and made a fix for it. Here’s what you
can do to apply the fix if you need it urgently:
- Download [this file](https://github.com/Ultimate-Blocks/Ultimate-Blocks/raw/master/src/blocks/tabbed-content/block.php)
and save it under the filename of block.php.
- Navigate to your WordPress plugins folder and go to the folder for Ultimate
Blocks.
- Go to the src/blocks/tabbed-content folder.
- Inside the folder, look for a file named block.php, and rename it into something
else (just to make sure you still have the old file when the new one doesn’t
work).
- Paste the block.php file you downloaded into the folder.
* If needed, you can repeat the above steps for src/blocks/content-toggle with
[this file](https://github.com/Ultimate-Blocks/Ultimate-Blocks/raw/master/src/blocks/content-toggle/block.php).
* Please let us know how it goes.
* Thread Starter [joshuabl](https://wordpress.org/support/users/joshuabl/)
* (@joshuabl)
* [4 years, 3 months ago](https://wordpress.org/support/topic/call-to-undefined-function-str_get_html/#post-15420110)
* Hi [@alexius08](https://wordpress.org/support/users/alexius08/),
* Added the updated block.php file and that fixed it (I didn’t need to add the
second file). Thanks for the help and quick response!
Viewing 2 replies - 1 through 2 (of 2 total)
The topic ‘Call to undefined function str_get_html()’ is closed to new replies.
* 
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## Tags
* [fatal error](https://wordpress.org/support/topic-tag/fatal-error/)
* 2 replies
* 2 participants
* Last reply from: [joshuabl](https://wordpress.org/support/users/joshuabl/)
* Last activity: [4 years, 3 months ago](https://wordpress.org/support/topic/call-to-undefined-function-str_get_html/#post-15420110)
* Status: resolved