The entire chain can't be uploaded as a single file. It needs to be broken on root and subsequent intermediates with each filename having the .pem extension.
The CA Certificate isn't affected by this.
If there was an attempt to upload the SSL Certificate in a different way than above, then a support case needs to be created since there are additional steps to be taken by the support engineer.
Waiting for fix in a future release of the DR system software.
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