hi, just got a problem (in v2.0.3 and 2.1-beta): I can’t remove a widget from a layout region, the browser (brave/chrome) console says:
Uncaught TypeError: Cannot read property ‘widgets’ of undefined
at Object.lD.getElementByTypeAndId (main.js:1417)
at Object.lD.deleteObject (main.js:985)
at HTMLDivElement. (main.js:1508)
at HTMLDivElement.dispatch (jquery.js:5237)
at HTMLDivElement.O.handle (jquery.js:5044)
lD.getElementByTypeAndId @ main.js:1417
lD.deleteObject @ main.js:985
(anonymous) @ main.js:1508
dispatch @ jquery.js:5237
O.handle @ jquery.js:5044
MS Edge:
0: Unable to get property ‘widgets’ of undefined or null reference [main.js (1410,9)]
As I don’t know how to fix it, I must recreate the whole layout and try not to make mistake. 
Please help!