New requests are not coming into ILLiad Lending and you can see pending requests in WorldCat Resource Sharing.
If you are self-hosted, you do not have to restart the server. You need to restart the ILLiad Connection Manager Service on your ILLiad Web Server. Then your Web Server Administrator needs to let you know the service has been reset and check to see if requests are coming in over the next ten minutes. If OCLC hosts you, then you would contact OCLC Support and ask for the ILLiad Connection Manager Service be restarted on your ILLiad Web Server.