Heuristics in too agressive firewalls sometimes flag the communication between the extensions server frontend (hosted on netlify) and backend (girder server hosted at Kitware) suspicious and may block access to the backend server. You can avoid the frontend server and download an extension directly from the backend via using bookmarks:
- Open the Extensions Manager in Slicer
- Click on the “wrench” icon in the top-right corner and select
Edit Bookmarks...
- Add the names of the extensions that you want to install to the list (each extension in a new line)
- Click
Install
button next to each extension’s name that you want to install (or clickInstall bookmarked
to install all bookmarked extensions)
If Install
button is disabled then click Check for updates
button to download the latest extension metadata descriptions from the server and then try installing again.
Let us know if this helped and then we add this instruction to the user manual.