Yes, this is a common issue that some Goa Game (https://goagamex.net/) users experience occasionally. You can try the following solutions:

Double-check that you entered the correct mobile number.
Make sure your phone has a stable network connection.
Wait a few minutes and request a new OTP.
Check if your SMS inbox is full or if any spam filters are blocking messages.
Restart your phone and try again.
If the issue continues, the Goa Game servers may be experiencing temporary delays. In that case, wait for some time and try later.

If none of these steps work, contact Goa Game customer support and provide your registered mobile number details for assistance.