I can't submit a testimonial

Hi Chris,

Good day!

When I updated your plugin to the latest version,I can’t post a testimonial anymore. I can post it if I’m logged in but if I’m not I’m just redirected to the wp admin link. Here’s the link: https://businessforcoaches.com/wp-admin/admin-post.php

You can try my testimonial form here: https://businessforcoaches.com/testimonial/

I am hoping for your kind response soon. Thanks! ??

https://www.ads-software.com/plugins/strong-testimonials/