Problem Checking Apps update

Hello,
Some portable apps are on a usb stick. Recently checking for updates get an error notice which says (as copied from the error message): "Unabble to connect to PortableApps.com to retrieve portable apps.
Please try again later. [InvalidZipFilePossibleConnectionOrFirewall]"
I have not done any changes in the system, did not touch anything in firewall settings, and have not any antivirus installed, just windows defender.
System is win 10 pro.
Last week when update still worked - the only update was the platform.
Answers will be appreciated.
Thanks
Motim