No Amazon Games are showing

Per the title! Since I got a new PC (circa mid November), no Amazon games are appearing on the Heroic list. I've fiddled with some settings, but found no definitive and up-to-date fix online, so the biggest thing I've done is re-installed Heroic, to no avail.

May be associated, but I often do get forcibly logged out of Amazon and have to log in.

Is there a known fix?
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