You have switched to using “API v2” for Dev desktop and, while trying to pull/push code, you are getting an error “ApiGetCloudSubByUuid”
ApiGetCloudSubByUuid can occur if you have Acquia Cloud IP restriction in place for the application. IP restrictions can be added to your Acquia Cloud application as an additional security measure to allow only IPs you have specified to access the it in Acquia Cloud UI.
Our documentation provides details around this at - https://docs.acquia.com/cloud-platform/access/ip-allowlist/
If you do have an IP restriction in place, and your IP is not present in the allowed list, this can block access to the application via dev desktop causing the error
ApiGetCloudSubByUuid. These restrictions can be viewed and verified by your account owner or administrator. This can be checked by them in the Cloud UI -> Security -> IP restrictions list.