The issue was data specific due to paid grant applications being imported from a third-party system into FIMS. As such, no AP history was created and therefore the grants could not be adjusted. The solution was to delete the applications in question in FIMS and to re-enter them manually into FIMS in order to go through the enter Grant\AP process and be entered into FIMS correctly.
Steps to Duplicate1. Go the Grants module\application history
2. Open the historical application to be adjusted
3. Go to the adjustments tab\Grant adjustments and then click Run Process
4. See the error come up immediately
5. Note, that upon looking at the AP activity tab on the application the message displays "No Payables for Voucher" which is due to the fact that the grant was paid in the third party system and not in FIMS AP and was imported as a paid historical grant.