IDCS user created but not able to use the same login ID and password into OTM-Dev environment

Summary:

An IDCS user has been created; however, this user is unable to log in to the OTM-Dev environment using the same login ID and password.

The error message received is:

"Invalid username or password."

Could you please advise on the possible cause of this issue and any checks required to resolve it?

Thanks.

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):