CCS Error: Error "Invalid_grant" when creating token for REST API

Products

• Control Compliance Suite Standards Server
• Control Compliance Suite

Issue/Introduction

When configuring the user with the REST APIs using a clear text password with special characters, the error "invalid_grant" is displayed.

Environment

Release:12.6.x

Component: CCS REST API 

Cause

Python has a limitation with certain special characters that might be included in a password. 

If one or all of the following special characters are included in the password, you may get the 'invalid_grant' error.
+ (plus)
& (ampersand)
% (percent)

Resolution

Create a password that does not use any of the following special characters:  +  &  %