That module is enabled by default in the Bitnami deployments
LoadModule ssl_module modules/mod_ssl.so
Could you please let us know if you modified the default Apache's configuration or if you removed the module by mistake from the modules folder?
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.