Identify the required account attributes to create an account in your target source
Set static value for each attribute in Create Profile
Test the provisioning and see whether it succeeded
If it is success, then you can start build the logic on each account attributes.
This way, you can first easily identify the required attributes, and valid values for each attribute. Then you will get a clarity on what is expected in each attribute and what is the actual value you are getting on the logic, this leads you to debug the transforms or rules well.
To debug your error,
Get the provisioning plan of this error (SailPoint Search > identity by name > Account Activity)
Check each Account Activity event which includes the target source and inspect whether all the required attributes are included and populated with valid values
Check in Create Profile for each attribute included in the provisioning plan and see whether it is using any transforms and debug it.