API calls must use alphanumeric characters in the param name. If a call includes invalid characters like a 'space' in the param name for example, the call will be blocked.
Data Center(s) Impacted
The recommended workaround is to follow the requirement of using only alphanumeric characters.
(A-Z, a-z, 0-9, _, -, .)
Cause & Fix
Product management is aware of the issue and investigating a fix.