Pilot error Pavlovia

Whenever I try to run my experiment in Pavlovia it keeps giving me this error.
And it doesn’t matter whether I turn the Pilot token off and turn the Running token on, or the Inactive token on, I keep getting this same message when I try to run the experiment in Pavlovia. Does anyone know how to fix this?

Have you tried refreshing your browser cache (Ctrl+F5) or clearing your browser cache? (Browser settings -> Clear Cache)

Yes, I tried that. It didn’t change anything unfortunately.