Cannot run playcanvas app from mobile

hello friends
today pc apps work strange for me.
maybe in 50% of tests i can’t run app on mobile
in console there is an error

what’s the problem?

This runs fine for me: Camera following a path - PLAYCANVAS

Can you provide a project that doesn’t work for you?

one more question here
sometimes when i can connect on mobile, i see artifacts, but console says all’s working fine

I get a 404 for that link