If I can send offer for 1 player that is on negotitations transfer list from his team, then i'm on same server, but I can't send offer from any other player from that team, try yoursef. Select random player on negotiations tab, press send offer, when he asks you about offer details click on his picture to open his team info. Attachment 28823
In team info look for any other 3-5* player.
Is there send offer under his stats?