“The definition for this element could not be located. You may need to activate a plugin. The type declared for this element is: undefined”

[Karolina_Kadlecova]

Hi,
We cannot edit any elements on trchova.cz, get this ““The definition for this element could not be located. You may need to activate a plugin. The type declared for this element is: undefined””. I checked the forum, nothing unusual in htaccess, I also went through the usual procedures (checking for plugin conflict, etc.).
Edit: we also cannot create new posts and pages, we get a very messy page.
Thanks for any advice!

[ruenel]

Hello @Karolina_Kadlecova,

Thanks for writing in!

Please go to Cornerstone > Settings > Permissions > Administrator and make sure that Post and Pages were enabled.

In Elements, make sure that all elements are toggle and active as well. If this is not helping, we can log in to check your site. You can create a secure note in your next reply with the following info:
– Link to your site
– WP login URL
– WP username
– WP password
– WP Administrator Role
– Confirmation that we can access and make changes to your site

To know how to create a secure note, please check this out: How The Forum Works

Best Regards.

[Karolina_Kadlecova]

Thank you, @ruenel, just left a secure note at the first post.

[ruenel]

Hello @Karolina_Kadlecova,

In Tools > Site Health > Info > Server, you only have 8M Post Max Size PHP value. Please have it increased to at least 64M and the File Upload Max too.

• How to Increase the Maximum File Upload Size in WordPress (wpbeginner.com)

Kindly let us know how it goes.