Error after activation on network admin page.

Thanks ntyknet, the error you are facing is unrelated to the error reported in the previous thread, hence keeping them separated makes it easier for future users to read through them and identify possible issues with their own installations.

Now, as far as I can see, there is an error in the menu adjustments of the CF7 section of the dashboard.

This plugin installs and uses a WP std table list for CF7 form post, namely edit.php?post_type=wpcf7_contact_form. The default CF7 plugin uses a custom page to display the table list which made it difficult to insert custom columns (the polylang links). So this plugin adds a new sub-menu to the Contacts section as well as removes the previous sub-menu page.

Your error comes from this part of the code. This is using WordPress Core functionality, so I think the error is coming from your theme or another plugin which is clashing with this.

Basically the error is saying that it cannot find the CF7 default menu. Are you by an chance modifying your Dashboard menus in your theme functions.php file?

It just dawned on me that you are using this on a multi-site!!!!

I think I know where the error is coming from. Do you by any chance have some child sites where the CF7 plugin is not active?

Sorry, that doesn’t really help. Can you try to deactivate all your plugins except the Polylang plugin, the CF7 plugin and the CF7 Polylang Extension Module and see if it works.