Can't Advance in Hindi Tree
There is a matching exercise in Letters 4 that is incorrect... It won't let me match "rū" with the Devanaagari characters, even when it is the last match to be made.
This seems to be a bug that's affecting quite a few users.
Can you please take a screenshot and submit a bug report here - https://support.duolingo.com/hc/en-us/requests/new ?
Hopefully it's resolved soon!!