If the novel offline function in the browser is no longer effective, clicking it will show that it is offline. This may be due to the following reasons: 1. The novel has expired or been deleted: If the novel in the browser has expired or been deleted, the offline function will not work. 2. Internet Connection Problem: If the browser cannot connect to the Internet, it may affect the offline function of the novel. 3. Browser-setting issues: If the browser is set to prohibit access to offline content, it may affect the offline function of the novel. If the novel offline function in the browser is no longer effective, you can try to download the novel again or change to another browser to view the novel. If you still encounter similar problems, it is recommended to contact the customer service of the UA browser for further help.