User Profile: Page Not Found
If a Page Not Found error occurs when you try to view a Profile page, you can try the following to fix the issue:
1. Make sure that you have correct User page assigned in wp-admin > Ultimate Member > Settings > General > Pages.
2. Check the Permalink structure setting on wp-admin > Settings > Permalinks. Choose the Post Name option.
3. Do a conflict test by disabling all plugins except the Ultimate Member plugin and switching to the default WordPress theme.