There could be several reasons why you are unable to add friends on Facebook. Here are some common reasons and steps to resolve the issue of “cannot add friends on Facebook”.
- Check your privacy settings to ensure that your friend requests are not restricted.
- Facebook has certain limits on the number of friend requests you can send. If you've reached the limit, you may need to wait before sending more requests.
- If you've sent friend requests that were marked as unwelcome or reported as spam, Facebook may temporarily block you from sending more friend requests.