Looker Studio will not let me save 'Add bin'

I am using Looker Studio. I have been able to use ‘Calculated Field → Add Bin’ before without issue. I am trying to use it yesterday and today, but cannot click the ‘Save’ button. I was able to hit ‘Save’ yesterday once, but it would not populate the new bin in the field list.

Today, can’t do anything. Glitch in the system?

I have been experiencing this issue as well over the past week.