A blank screen, timeout, and security warning are different symptoms. First, switch between mobile data and Wi-Fi, then check that your browser is up to date and the address is spelled correctly. You can clear the cache and try again, but do not enter information into unfamiliar pop-ups. If other websites load at the same time, the issue is more likely to involve the local network or address; if no sites load, check your connection.
How to Narrow Down Possible Causes
- Misspelled address or old bookmark: type the address yourself and verify it.
- Browser issue: update it and do a limited check in private mode.
- Network issue: try switching to a reliable connection.
- Site changes: read the latest notice from official support.