Thanks for reaching out to us. I checked but was unable to replicate the issue. I was able to change the profile rate directly from the profile page. Please go on your profile and scroll down until you see your rate, hover over that section and an edit button should appear as shown in this screenshot. Also, please try clearing your cache and cookies or using a different browser. Let us know if the issue persists so that we can assist you further.
It looks like you are an exclusive member of your own agency so you will need to change your rate from the agency roster. In order to do it, click on the round picture in the upper right corner and switch to your agency account. Then go to Find Work > Agency Roster, click the checkbox next to your name and select Profile Rate in Change Roster Settings drop down menu. You'll be able to edit your hourly rate there.
It looks like you haven't completed your profile yet. Please, follow the steps to complete and submit your profile for a review and you will be able to change your rate anytime later.
You need to first complete your profile. When you log into your account, you'll see the Create your profile page you can upload your picture, write your title, description, add your skills and set your profile rate:
Please, follow those steps and submit your profile when you are ready.