There was a browser-only crash affecting players after receiving certain HMs or mounting a Bicycle.
This issue has now been fixed. If you were stuck yesterday after receiving an HM or trying to use a Bicycle, you should now be able to continue normally.
Apologies for the inconvenience. The browser version is still relatively new for us, and we are continuing to learn and iron out some of its platform-specific quirks as we go.
Best regards,
Snakes