Hi there,
Thanks for your message, we love to help. Based on what you’re stating, there’s an error with the plugin and it is not running correctly on your WordPress Admin only. It happens, not very often and in really odd cases but if this incompatibility can’t be fixed, there’s a workaround for WordPress users when the plugin doesn’t run correctly:
https://help.contactus.com/hc/en-us/articles/202794306-What-if-your-WP-and-your-C-U-plugins-just-don-t-get-along-.
The above article will show you how to implement the forms without using the plugins.
I hope to be of assistance and if there’s anything else I can help you with please let me know.
May leads be upon you!
Kind Regards,
JP Andrino
ContactUs.com