It may be possible that you try to activate the license key and get the error:
cURL error 35: Unknown SSL protocol error in connection to wp-staging.com:443
cURL error 28: Operation timed out after 100001 milliseconds with 0 out of 0 bytes received
cURL error 28
The first cURL error 35 happens because your site is trying to connect to WP STAGING servers but failing because the connection method your server is using is not supported anymore. (If you are familiar with SSL: We switched off support for TLS 1.0)
What needs to be updated is curl and OpenSSL. This should be updated not only for the functionality of WP STAGING and your SSL connections, but for the security of your site in general as well.
If you are not hosting the site yourself, you will need to reach out to your host and ask them to update the curl and the TLS version.
If you are not able to update curl and OpenSSL and your host is refusing it you can contact us, and we create a workaround for you to be able to use the push function without activating the license key.
Despite that, it’s highly recommended updating curl and OpenSSL on your server for security purposes.
cURL error 28
This cURL error can happen if the firewall on your server blocks outgoing connections to wp-staging.com. Please allow your server to open a connection with wp-staging.com to solve this. Usually, your hosting provider is the first contact person for doing that.
You will not able to update WP STAGING automatically until both cURL errors are solved, but you can still always download the latest version from your account.