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

Your account is locked out. Please reset your password by clicking the 'Forgotten your password' link. 


The error means that password needs to be updated on DHL Parcel UK end via 

Password needs to be minimum 12 characters long with both lower/upper case in it.

Once completed, it would also need to be updated in > Shipping > Integrations > DHL Parcel UK > Config