Could you please let us know what exact issues are you facing now? Maybe some screenshots could help. What are the Redmine versions (origin and destination)?
Also, we have a Support Tool that will gather relevant information for us to debug the issue. Could you please download and execute it on the machine where the stack is running by following the steps described in the guide below?
How to Run the Bitnami Support Tool
Please note that you need to paste the code outputted by the tool in your reply.