Fatal error in wp-admin page only when activate Gravity forms

Hey there,

This problem can be a compatibility issue. To find the culprit (a conflicting plugin or theme), you may follow this flowchart: https://premium.wpmudev.org/wp-content/uploads/2015/09/Support-Process-Support-Process.gif. Remember to backup your site before

Also, I suggest that you enable debug mode. Check these links to read more about debugging with WordPress:

https://codex.www.ads-software.com/Debugging_in_WordPress
https://codex.www.ads-software.com/Debugging_in_WordPress#Example_wp-config.php_for_Debugging

At last, this issue would be better addressed if you ask for help directly on the Gravity Forms support page: https://www.gravityforms.com/support/

Hello Euler

yes, currently my site is in define (‘WP_DEBUG’, true); and the log shows the error:

/alarma24.com/secure/wp-includes/post.php:21) in / alarm24 .net / public / wp-includes / post.php on line 20

I have all the plugins, themes and wordpress updated. the error is only shown when gravity forms is activated and i can’t log in

Only this line? Try to add these too:

// Enable Debug logging to the /wp-content/debug.log file
define( 'WP_DEBUG_LOG', true );

// Disable display of errors and warnings
define( 'WP_DEBUG_DISPLAY', false );
@ini_set( 'display_errors', 0 );

// Use dev versions of core JS and CSS files (only needed if you are modifying these core files)
define( 'SCRIPT_DEBUG', true );

Also, have you already tried to deactivate all your plugins, switch to a default theme and check if the issue persists?