To share a post from someone’s else’s profile to your own, you will first need to make sure your settings have this feature activated. Here’s how…

Go to the SETTINGS page (looks like a “gear” symbol at the top right corner of the XAPiT page). Click “Privacy”. Scroll to the section marked “Recent Activity Privacy”, then find the option marked “Shared” and make sure there is a check in the box to the left of “Shared”. Finally, scroll down to the bottom of the page and click the blue “Save Changes” button. Sharing the posts of other members to your profile should now work perfectly!