Deploy R Shiny - multi users

Hello, i am a naive beginner in gitlab.

I am a statistician teacher and develop R Shiny applications for my students. I have access to Gitlab and to OKD OpenShift. I tried to share my Rshiny app to my students by creating a Rshiny type project in Git lab and then use OKD to deploy it online. However, it appears that only one user at the time can access the website otherwise it bugs for everyone. Does anyone had a similar issue or an explanation for that ?

Thank you !