Sorry for the inconvenience, I've tested with Arc and can confirm this error, I didn't know why this happens. I will check further to determine the reason and report it to the upstream library (I think it's because the engine or Arc itself)

Since, Arc is built over chromium and does not have active inbuilt chrome popups and error dialogues.

Most probably it because of cache utilization and network overload, can simply be solved with clearing cache and creating a service worker for managing download of model and invalidating memory.