Simple app sometimes doesn't work ShinyApp

Hi everyone, I'm new in this community. I'm currently having some issues with my app. When I run it in RStudio it does work perfectly, but when I deploy it to shinyapps.io, sometimes works, sometimes it doesn't work. In the browser console it shows jquery error, and Javascript libraries load error. It basically doesn't load as it should. It happens too often, I don't know if this is a shinyapps.io error specifically or I need to do something else? Or I need to pay for a plan (Currently using the free version).