Sendbird chat admin message spanish content not showing correctly

I am using sendbird chat.js(web portal).and i am sending the admin message via API.
If i send English content its showing correctly. But if i sent the Spanish content (some letters)
are not showed correctly ,instead shows symbol.
eg: finalizó (the letter ó).

Is there any fix to this?


Sorry, this one? SendBird-JavaScript/web-sample at master · sendbird/SendBird-JavaScript · GitHub