What could be the cause of my standalone reports server oracle 12c stopping working every 10, 15 or

We installed oracle forms 12c on windows server 2019 standard at one of our clients. The java version is 1.8.0.361.
Everything was fine until the 15th day when our report server started to bug. Restarting the report server put things back in place and everything started to work until the next 15th day. We did the same thing again. We experience this situation every 15, 20 days. We combed through all the parameters of the rwserver.conf file and adjusted the ones that were needed but the problem remains. We told ourselves that the problem was related to the client's server and while waiting to find the solution, we installed a second client. Ten days later, we find the same situation