Windows 10, NSS v5.5.6

Added a Trusted App via the data browser and that resulted in a modified card$.ttl file with malformed URI:s such as:

pim:preferencesFile
    <https://rogerfgay.solid.hll.nu:7443%2Fprofile%2Fcard//settings/prefs.ttl>;

Since I'm stuck on Windows, I don't mind trying to fix this, but I'm still a bit of a newbie and would appreciate being pointed to the parts of NSS that are likely to be where the problem is.