iPayment against Square Gateway will not work properly against Sandboxes / Demo Mode from 25th of June 2020

Hi All
We have been informed by Square that the current API we use against Square has been deprecated and will not work after the 25th of June 2020. We where told this on very short notice and that combined with the fact that the new API is not backward-compatible with the old one, will most likely give some disruption as it has proven very tricky to both have the old and the new system in place at the same time due to the nature of the breaking changes.

This means that we can't guarantee that sandbox and our demo account after the above date.

FAQ:
Q: When do you have a solution for this?
A: We are not planning of supporting Square Demo Mode anymore.

Q: Are other gateways affected?
A: No, Only Square gateway is affected

Q: I'm live on Square. Will I be affected?
A: Square Support have promised us that customer running in live mode should not be affected, but we only have their word for it as it can't be tested.