This is to make you aware that we have removed South Brazil as an option for the regions to execute Load tests. Users are advised to follow the workaround mentioned below.
Workaround : We recommend Load Test users to choose a location other than 'South Brazil' when triggering a load run. See 'Run and Analyze your load test' section in this document for instructions on how to choose a location.
Customers can also use their own agents (documentation here) to perform load generation in this region.