Hoping someone here works for them.

Problem shows up in latest Firefox and a six month old Chromium.

    Uncaught (in promise) Error: Permission denied for id VXNlcjp1bmRlZmluZWQ=, with metadata: [HimejiMetadata(entityType=USER, entityPart=ALL, accessLevel=WRITE, entityId=null)], path: /updateUserData, type: Mutation.UpdateUserDataMutationResponse
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        changeCurrency https://a0.muscache.com/airbnb/static/packages/web/common/bc58.56da9ca247.js:55
        default https://a0.muscache.com/airbnb/static/packages/web/common/bc58.56da9ca247.js:31
        D https://a0.muscache.com/airbnb/static/packages/web/en-GB/frontend/locale-settings/containers/LocaleSelectorModalContainer.a742f986c5.js:32
        u https://a0.muscache.com/airbnb/static/packages/web/common/ee00.2b796fffb9.js:21
        onClick https://a0.muscache.com/airbnb/static/packages/web/en-GB/05040.c2446c1290.js:36
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        Yr https://a0.muscache.com/airbnb/static/packages/web/common/2f80.3314d472af.js:11
        Xr https://a0.muscache.com/airbnb/static/packages/web/common/2f80.3314d472af.js:11
        tl https://a0.muscache.com/airbnb/static/packages/web/common/2f80.3314d472af.js:11
        zs https://a0.muscache.com/airbnb/static/packages/web/common/2f80.3314d472af.js:11
        Ue https://a0.muscache.com/airbnb/static/packages/web/common/2f80.3314d472af.js:11
        tl https://a0.muscache.com/airbnb/static/packages/web/common/2f80.3314d472af.js:11
        ot https://a0.muscache.com/airbnb/static/packages/web/common/2f80.3314d472af.js:11
        at https://a0.muscache.com/airbnb/static/packages/web/common/2f80.3314d472af.js:11