Notice: Undefined index: _inline_edit

I am getting the following error when trying to save a contact form 7 form. May occur in other areas but not tested every posisble scenario.
Deactivating yuzo plugin solves it.

Notice: Undefined index: _inline_edit in /home/zenfusio/multisite1/wp-content/plugins/yuzo-related-post/assets/ilenframework/core.php on line 4750

Warning: Cannot modify header information – headers already sent by (output started at /home/zenfusio/multisite1/wp-content/plugins/yuzo-related-post/assets/ilenframework/core.php:4750) in /home/zenfusio/multisite1/wp-includes/pluggable.php on line 1219