The main reasons can be summarized as follows:
(1) The address entered is incorrect. Please re-enter.
(2) Another server is busy, has a fault or has stopped serving. Please try again later.
(3) Network link error. Doing a few more "refreshes" may solve the problem.
(4) The user has no access to the website. Some websites are only open to registered users, or only serve specific user groups.
(5) The access path is wrong. Some websites cannot be accessed by directly entering the address in the browser, and they must be accessed through the specified related links.
(6) The visited website has been cancelled or closed.
(7) The request to visit the website is blocked for other reasons.
(8) Internet trunk failure.
(9) The domain name resolution of the visited website is incorrect or incomplete.
(10) The user's computer cannot open or watch some websites without the necessary system or software support.
(1 1) The visited website denies access from a specific area.