Non-Toast Gift Cards stopped working suddently

[mdR1P]

We have some physical gift cards with mag-stripe that we've had in-use before we started with Toast. We have been using them without issue and planned to run through them before ordering Toast supplied gift cards. Last night I went to activate a card and the system would no longer accept any of these cards with the error message "Card is not valid at this restaurant." I have on-hand a card I made two weeks ago for a giveaway that hasn't been picked up. It activated with no problem, even printing a confirmation chit. Even that card cannot be redeemed or be read via mag-strip OR manual entry to check the balance. When I went back to transactions from that day, I can't open the card transaction on the back end, getting a Toast server error message on the computer. Has anyone else had issues, or can anyone offer assistance?

[rcmck]

Have you searched your inactive cards for any of your unused card numbers? Do they appear in that report? Also could you look at other gift card transactions, from any time or card and see if you also get that error in your attached screenshot? 

[mdR1P]

The numbers in the Inactive Cards list seem to only be connected to a batch of Toast brand gift cards we got branded for our side concept bar. (I am currently able to activate and process the Toast branded cards).

Another recent sale of an original non-Toast card gives the same error and appears to be wiped from the system even though it was activated and paid for through Toast on 3/25 (which happens to be the same date for the promo card I have on-hand still). These activations/Add Value DO show in my Gift Card Transactions list, but not in the Inactive list or GC Balance List.