Uncaught TypeError: Cannot read property 'type' of null

http://localhost:8069/web/static/src/js/chrome/view_manager.js:522
Traceback:
TypeError: Cannot read property 'type' of null
    at Class.do_load_state (http://localhost:8069/web/static/src/js/chrome/view_manager.js:522:69)
    at Array.<anonymous> (http://localhost:8069/web/static/src/js/chrome/action_manager.js:614:42)
    at Array.<anonymous> (http://localhost:8069/web/static/lib/jquery/jquery.js:3276:89)
    at fire (http://localhost:8069/web/static/lib/jquery/jquery.js:3119:58)
    at Object.fireWith [as resolveWith] (http://localhost:8069/web/static/lib/jquery/jquery.js:3231:49)
    at Array.deferred.<computed> (http://localhost:8069/web/static/lib/jquery/jquery.js:3321:62)
    at fire (http://localhost:8069/web/static/lib/jquery/jquery.js:3119:58)
    at Object.fireWith [as resolveWith] (http://localhost:8069/web/static/lib/jquery/jquery.js:3231:49)
    at Array.<anonymous> (http://localhost:8069/web/static/lib/jquery/jquery.js:3283:104)
    at fire (http://localhost:8069/web/static/lib/jquery/jquery.js:3119:58)