If it’s from the support page, go find the alien core again, then click the big orange READ ME FIRST button and find the command you need to use to get it
through the support us purchase page, it worked a short time later using the command again. as for the one that went poof when linked to container dont know. looked everywhere for it not sure what happend.
only had a second core after buying second one once the first one vanished. was moving the cores around in a new ship and was linked to a container but it vanished so im not sure. guess its a loss just to bad since didnt even get to use it.