The application catalog website role did not find an SSL certificate required to communicate with the application catalog ...

%11The application catalog website role did not find an SSL certificate required to communicate with the application catalog web service role. 

Possible causes: 1) The application catalog website role is configured to communicate using HTTP, but the application catalog web service role that this website communicates with is configured to use HTTPS.  2) The application catalog website is configured with an HTTPS binding in IIS but no certificate is configured for the binding. 
Solution: 1) Configure the application catalog website role with the required SSL certificate.
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