User name Journal Submitter doesn't exist. Enter an existing user name. (FUN-720467)

Summary:

Error while uploading Journal Approval Rules using Spreadsheet - User name Journal Submitter doesn't exist. Enter an existing user name. (FUN-720467)

Content (please ensure you mask any confidential information):

Trying to upload Journal approval rules (using Spreadsheet) with below data but getting this error - User name Journal Submitter doesn't exist. Enter an existing user name. (FUN-720467)

The User mentioned in Top Approver field is a valid user existing in system.

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

24B (11.13.24.04.0)

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