From the 1st of March of 2022, the WebAPI versions before API V6.0 will be deprecated. This means from that date you will no longer be able to create new API keys for the previous versions. and we will no longer provide support for deprecated versions:
V4.1, V4.2, V4.3 and V4.4
V5.0, V5.1, V5.2 and V5.3
From the 1st of March of 2023, V4.x and V5.x will be removed from the System. So any website that has not upgraded before this date will no longer display property results.