I know the problem is resolved but I want to share my opinion for other members. When i face this issue on my website then i solve this problem by observing the following points :
Some WordPress themes do not support tags. If this is the case, you can try switching to a different theme that supports tags.
In your WordPress settings, you can choose to disable tags for your posts. To check if tags are disabled, go to your WordPress dashboard and click on “Settings,” then “Writing.” Look for the option “Tags” and make sure it is checked.
Sometimes, a plugin can conflict with the tag feature in WordPress, causing it to disappear. Try disabling any plugins that you recently installed or updated to see if this resolves the issue.
