>>1822952
ok, so after you hit enter (and I get this sounds convoluted but I'm not the anon who shares the cookie method so bare with me a little), you need to leave that page open, go to a new tab, and then go to the Monmusu Browser Game page in the new separate tab without closing out that tab.
Only after you successfully load in should you close out the original tab, and you shouldn't need to do this again unless you accidentally close out of the browser itself entirely or something. Hopefully this can help.