Javascript console error XWiki.watchlist is undefined

Uncaught TypeError: XWiki.watchlist is undefined
    b compatibility.js:544
    each prototype.js:859
    <anonymous> compatibility.js:547
    bindAsEventListener prototype.js:417
    createResponderForCustomEvent prototype.js:7282
    fireEvent_DOM prototype.js:7141
    fire prototype.js:7130
    trigger eventsBridge.js:51
    jQuery 4
    O InplaceEditing:19
compatibility.js:544:8
    b compatibility.js:544
    forEach self-hosted:160
    each prototype.js:859
    <anonyme> compatibility.js:547
    bindAsEventListener prototype.js:417
    createResponderForCustomEvent prototype.js:7282
    fireEvent_DOM prototype.js:7141
    fire prototype.js:7130
    trigger eventsBridge.js:51
    jQuery 4
    O InplaceEditing:19