I just installed the same version of the Osclass installer and cloud install and enable the plugin without problem. The one I installed was this one
I uploaded it first
and you can see that the installation was successful.
Can you try that plugin?
In case you ran into issues again, we have a Support Tool that will gather relevant information for us to review your logs. 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.