Please try the following if you are having trouble with the reCAPTCHA image authentication.
・Login with a different browser
Image authentication tends to become more difficult if you failed to login repeatedly.
Image authentication might become easier for you if you try to log in with a different browser.
・Log in using your Google account
You might be able to bypass image authentication if you have linked your Google account.
Please modify the settings for "Google Login" before logging in via "Sign in with Google" at the login screen.