On a Chromebook: Settings - Apps - Google Play Store - Manage Android preferences - Security & Location - Location
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Yeah I’ve just found this too after the new patch made no difference. Cheers, 
Forgot to add: Version 88.0.4324.153 (Official Build) (64-bit).
You can manage the location permission specifically for the Zwift app via Settings - Apps - Manage Your Apps - Zwift
well, that did the trick this time. thanks. we’ll see if it lasts…