When entering the domain name do not use the Simple Domain name such as DOMAIN. You need to enter the FQDN such as DOMAIN.LOCAL.COM the core / console cannot validate the credentials entered within the time allotted for the validation process with Active Directory
When you are at the screen to add the credentials if you add the FQDN rather than the simple domain name you will be able to proceed.
If you are still having an issue with the Push Wizard after entering the FQDN when you are asked to apply a license file, leave that open and do not point to the license file (can be applied after the install completes by right clicking the agent icon in the console and choosing the license option) which can help the Push Wizard get past the error 1057.
If further credential issues persist you should also add an entry to the Host file on the core pointing to the agent and on the agent pointing to the core which helps with odd validation errors.
Adding a HOST file entry how to link is below per Microsoft: