After last patch certain worlds will not load

using same laptop and browser :
"Wereld 5" I can log in with both accaunts
"Wereld 3" I can log in with an other account but not wit this one
console
VM63564:540775 Uncaught (in promise) TypeError: qx.locale.Manager.getInstance(...).getPreDefaultLanguageCode is not a function
at cC.loadLoca (eval at (index.aspx:293:9), :540775:132)
at cC.initUI (eval at (index.aspx:293:9), :540759:573)
at Object.active (eval at (index.aspx:293:9), :540756:128)
at L (webfont.js:21:674)
at oa (webfont.js:24:374)
at W.g (webfont.js:23:787)
at webfont.js:21:1602
loadLoca @ VM63564:540775
initUI @ VM63564:540759
active @ VM63564:540756
L @ webfont.js:21
oa @ webfont.js:24
W.g @ webfont.js:23
(anonymous) @ webfont.js:21
Promise.then (async)
Q.start @ webfont.js:21
(anonymous) @ webfont.js:26
setTimeout (async)
ra @ webfont.js:25
(anonymous) @ webfont.js:26
(anonymous) @ webfont.js:33
E @ webfont.js:20
(anonymous) @ webfont.js:20
d @ webfont.js:19
A.b.onload @ webfont.js:19
load (async)
A @ webfont.js:19
Fa.load @ webfont.js:33
qa @ webfont.js:26
pa.load @ webfont.js:24
(anonymous) @ webfont.js:33
(anonymous) @ webfont.js:33