You might have run out of permitted PUT operations for an account. Every account is restricted to certain number of PUT operations which you can see in the top right corner of the Authenticator. You can try using the browser for development which uses mock routing and then finally use the browser against actual network. Mock version stores the data locally on your computer for development and testing purpose.
You can download the mock version of the browser from the latest release. However, if you want the examples for working with mock you will have to build it on your own for now.
You can follow the instructions here and please do remember to set the
NODE_ENV=dev before installing the dependencies.
Let me know if you have any difficulties trying out.