Da bin ich wieder mit einer Spur die ich gefunden habe. In der Chrome Console kommt dieser Fehler hier:
/backend/Emotion?file=app&no-cache=1598921219+1+1:1273 Uncaught TypeError: Cannot read property 'show' of null
at i.typeSelect1Function (/backend/Emotion?file=app&no-cache=1598921219+1+1:1273)
at i.g (ext-all.js?202008121209:formatted:1226)
at h.fire (ext-all.js?202008121209:formatted:5668)
at i.continueFireEvent (ext-all.js?202008121209:formatted:17300)
at i.fireEvent (ext-all.js?202008121209:formatted:17285)
at i.fireEvent (ext-all.js?202008121209:formatted:38871)
at initComponent (/backend/Emotion?file=app&no-cache=1598921219+1+1:1212)
at i.constructor (ext-all.js?202008121209:formatted:30273)
at i.callParent (ext-all.js?202008121209:formatted:2490)
at i.constructor (ext-all.js?202008121209:formatted:38350)
wenn ich es aufklappe kommt noch das hier:
typeSelect1Function @ /backend/Emotion?fil…1598921219+1+1:1273
g @ ext-all.js?202008121209:formatted:1226
fire @ ext-all.js?202008121209:formatted:5668
continueFireEvent @ ext-all.js?202008121209:formatted:17300
fireEvent @ ext-all.js?202008121209:formatted:17285
fireEvent @ ext-all.js?202008121209:formatted:38871
initComponent @ /backend/Emotion?fil…1598921219+1+1:1212
constructor @ ext-all.js?202008121209:formatted:30273
callParent @ ext-all.js?202008121209:formatted:2490
constructor @ ext-all.js?202008121209:formatted:38350
i @ ext-all.js?202008121209:formatted:2884
widget @ ext-all.js?202008121209:formatted:3382
create @ ext-all.js?202008121209:formatted:30136
lookupComponent @ ext-all.js?202008121209:formatted:50127
prepareItems @ ext-all.js?202008121209:formatted:50107
add @ ext-all.js?202008121209:formatted:50140
initItems @ ext-all.js?202008121209:formatted:50037
callParent @ ext-all.js?202008121209:formatted:2490
initItems @ ext-all.js?202008121209:formatted:60649
initComponent @ ext-all.js?202008121209:formatted:50027
callParent @ ext-all.js?202008121209:formatted:2490
initComponent @ ext-all.js?202008121209:formatted:60642
callParent @ ext-all.js?202008121209:formatted:2490
initComponent @ ext-all.js?202008121209:formatted:60798
callParent @ ext-all.js?202008121209:formatted:2490
initComponent @ base?file=bootstrap&…dIn=1598921219:4437
callParent @ ext-all.js?202008121209:formatted:2490
initComponent @ ext-all.js?202008121209:formatted:73310
callParent @ ext-all.js?202008121209:formatted:2490
initComponent @ base?file=bootstrap&…edIn=1598921219:121
callParent @ ext-all.js?202008121209:formatted:2490
initComponent @ /backend/Emotion/loa…1598921219+1+1:4644
constructor @ ext-all.js?202008121209:formatted:30273
callParent @ ext-all.js?202008121209:formatted:2490
constructor @ ext-all.js?202008121209:formatted:38350
i @ ext-all.js?202008121209:formatted:2884
eval @ VM6672:3
Manager.instantiate @ base?file=bootstrap&…dIn=1598921219:3369
(anonymous) @ ext-all.js?202008121209:formatted:1261
create @ ext-all.js?202008121209:formatted:2215
onOpenSettingsWindow @ /backend/Emotion/loa…1598921219+1+1:8305
fire @ ext-all.js?202008121209:formatted:5668
dispatch @ base?file=bootstrap&…dIn=1598921219:3863
fireEvent @ ext-all.js?202008121209:formatted:38872
openSettingsWindow @ /backend/Emotion/loa…1598921219+1+1:2784
fn @ /backend/Emotion/loa…1598921219+1+1:4094
eval @ VM7695:7
g @ ext-all.js?202008121209:formatted:6106
Und wenn ich dann noch oben rechts in der Console auf den Link klicke komme ich hier raus:
In der 6. Zeile von unten ist angeblich der Fehler, aber ich seh da nichts falsches dran.
Hat jeeetzt vielleicht jemand eine Idee? 
Vielen Dank im Voraus