Hi Raymond,
Please provide details about your Default path.
As per my understanding you are using GRAC_MANAGER as agent of your first stage in Default path.
What is your User Search and Details data source? Are the manager details are filled in the access request during submission or they are being automatically fetched from LDAP?
If possible, please share your GRAC_DEFAULT_STAGE settings.
Error message clearly shows that "No Agent Found". Please share your stage settings screenshots to assist further.
Regards,
Madhu.