The third party (GPI/Cayan) has rolled back their change temporarily. Credit card processing should now be working normally.
Affected customers will need to ensure that their operating system is up to date and supports TLS 1.2 and Cyphers TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (0xc030) or TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f)
If your IT team needs assistance with the above updates, please contact Point of Rental Support