In this case, I would suggest asking directly in ReportServer forums.
Please note that Bitnami packages and configures already existing applications. We can only offer support and help on basic and most frequent application configurations. Always based on the default configuration or on our guides.
If the issue is related to the application itself, probably someone with more experience and knowledge about that specific tool can help you better than we can.
Do not hesitate to write us back if you have any other question about the Bitnami solution