Update/Edit Manage Fields Database Not Possible

Dear Sir,
Thanks for your amazing plugin.

Problem 1
I have PHP 7.0 and the latest version of your plugin.
I am not able to update any Manage Fields Database. When I try to Change the field Name Title, or any other change, brings me : link :http://catholicsindia.in/wp-admin/admin-post.php and a 404 message: The page you are trying to reach does not exist, or has been moved. Please use the menus or the search box to find what you are looking for.

Problem 2:
The Rich Text / Textarea dont save the full content. though there are few paragraphs text, it shows or saves only very few around 250.

Please help
Thanks
Shyju

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