How To Add Double Slash On Cloudflare Access

I have a site which is used Sendy Mail. My site is using pretty URL. So, I would like to protect my website using Cloudflare Access. The URL is**//**settings. So, there are double slash, but when I create Access Policies, I can’t add double slash, so my website are looping now. So, May I add double slash on Access Policies? Thank you.