Problem

I have tried printing a DHL shipping label and am seeing an error returned:

LoginCredentials: 100: Validation Failure:Site Id is wrong. 

Solution

When filling in the details in the DHL integration, make sure that Site ID starts with v62_ followed by 10 random letters/digits, as supplied by DHL. 

If you have not received the Site ID in this format, please follow the registration via this link: https://xmlportal.dhl.com/register