Problems with iCloud email and Windows Live Mail

I have been been using Windows Live Mail for a long time on my Windows 10 PC without any problems. Recently I noticed that I am not receiving any new emails on my iCloud IMAP account.  I can see the new emails on my iPhone so I know the iCloud account is functional. I have other email accounts (both POP3 and IMAP) on my WLM setup that are all working just fine. I have tried deleting and adding the iCloud account, downloading the IMAP folders, and reinstalling WLM , but the problem remains. All my other accounts work fine with WLM, just the iCloud IMAP account wont download new emails ? Any help would be appreciated.