Hello!
The most common issue may be theme/plugin conflicts.
First, deactivate all plugins temporarily to see if this resolves the problem. If this helps, re-activate them 1 by 1, to find the plugin causing an issue.
Switch to a default theme like Twenty Seventeen using the WP dashboard. This will help you see if the theme is causing any issue
If this does not help, can you help by screenshoting what error you see etc.?
