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Please also note that if your host doesn't have the ca-certificates linux-package installed or up-to-date, you will also need to upgrade Community Builder to latest nightly version. CBSubs verifies the authorize.net certificate validity when doing https requests to it, and authorize.net changed certificates, using a certificate signed by a recent root certificate, that up-to-date linux distributions also have. For cases where it is not the case, latest nightly CB has a backup root certificates bundle corresponding to Firefox's official latest one.