I just want to publish an update for this for users who are faced with this problem in the future ... I'm not sure if it was because I added a public SSH key through the RHC setup, but did nothing (there is no permutation of the chain of folders with the copy , file switching) will work through the file downloader.
In the end, before deciding to call Red Hat and QQ, I used the command line console to add SSL files ...
Here is the command I used:
rhc alias update-cert php www.myapp.com --certificate myApp.crt --private-key myApp.key --passphrase mypass
This link contains additional information: https://access.redhat.com/documentation/en-US/OpenShift_Online/2.0/html/User_Guide/Using_Custom_SSL_Certificates1.html
TL; DR: you don't need to combine any Comodo files, just use your # 4 file, your secret key and your passphrase (if you have one)
source share