.htaccess file is replaced in Bitnami solutions for a httaccess.conf static file for security and performance reasons. You can find more information here.
With regards to the issue you are experiencing, could you please elaborate on the steps and command that you are using? What exact call is returning those errors? I would like to reproduce it on my side to ensure our configuration is correct.
Also, the links that you provided us with seems to indicate that there are 2 different JSON APIs (one of them listed as deprecated). Could you also specify which one of them are you using?
Finally, 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? You must click on the platform or cloud that you are using to find the correct instructions.
How to Run the Bitnami Support Tool
Please note that you need to paste the code outputted by the tool in your reply.
Thanks in advance.