When saving an address record a user will receive an error of 'Invalid DPS: DPS.' This occurs after changing the address to an International address and the DPC field has been filled in on the United States record. Invalid DPID can occur when changing an address in the United Kingdom to a United States address where the DPS field is populated (UK only)
Remove the data in the DPC field before changing the address from United States to a different country. If you do not see the DPC field, unmark it as hidden in Config > Fields.
For UK clients - remove the data from the DPS field, located on the right of the post code on Bio 1 screen, before changing the address.