Extensions-Manager: Extensions can not be installed

Support
1

Hello, I am unable to install new Extensions.

Following message show up.

Extensions can not be installed.
Failed to load extension page using this URL: @KitwareMedical/slicer-extensions-webapp
Check that 3D Slicer is properly installed.

Thanks in advance for your help.

2

That link opens for me, does it for you? Perhaps you are behind some kind of institional firewall.

3

Could be, I was able to access it a few weeks ago.

Thanks for the fast reply.