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If the trusted CA you purchased your certificate from requires an intermediate certificate or if you created a self signed certificate, you will need to specify the CA certificate chain in the configuration.  If you received your certificate from a trusted CA and they require an intermediate certificate, it will be provided by the CA.  If you followed the tutorial above for a self-signed certificate and also created an intermediate CA, it will be the file called 'ca-chain.cert.pem'.  If you simply created a CA without an intermediate cert, it will be the public CA certificate.  Once you've identified the CA certificate chain based on these descriptions, copy it to a file called 'rootCA.pem' on your development system.  Note this filename change is important and required.  Them it needs to be uploaded Upload the file via the configuration as shown here by clicking Save Changes:

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