@User: I'll leave the question above; I have put in a workaround with the absolute path and that is working. Now my main problem is that nothing happens when I Ctrl-click on the "Analog primitives validation" entries or the "Digital standard cells" entries. The "Git / Google-Skywater PDK links" documentation works fine with Ctrl-click. I don't get any error message from clicking on the boxes; it's just that nothing happens.

the 'analog primivives validation' boxes (as well as digital ones) are placement of symbols (they have no pins). just descend these by clicking and pressing 'e' key (descend into schematic). The google/skywater links use a symbol which has a 'url' attribute. ctrl-clicking a symbol triggers the url, so the appropriate application is fired (browser/pdf reader etc). The 'analog primitives validation' symbols do not have a url attribute so ctrl-clicking does nothing. In some cases i set this url attribute to bring up a description /spec for that symbol.

@Stefan Schippers: Ah, that's an error on your startup page, then. It says "Ctrl-click to open link" next to these boxes. I was trying to do that, and it didn't work. Click+"e" works.

Thank you, will make it clearer 🙂