Start with the simplest checks: confirm you are entering the mobile number, email, or username you used during registration, and make sure there are no extra spaces around the text. Passwords are case-sensitive, so verify that Caps Lock is not switched on and that your phone keyboard has not capitalised the first character automatically.
If the page loads slowly or times out, try switching between Wi-Fi and mobile data. Old browser cache can also cause form problems — close all tabs, reopen the browser, and visit the Login page fresh. A private browsing window is useful for isolating stored session issues. If none of these steps resolve the problem, use the account recovery process to reset your credentials.