Hello @Jing Han,
Welcome to Atlassian Community!
Checking the details of your site, I can see that it's currently active and your account has permission to access Jira Software.
Also, I can see that the site-admin and other users didn't log in on the past days, but it should impact you accessing the site.
I added the link here using an incognito tab and I'm redirected to the login page.
Are you facing this issue after logging in?
Have you tested using another browser?
Can you check with the site administrator if they are able to login?
Regards,
Angélica
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