Can you try pressing F12 and see if there are any errors in the browser console?
It could also be a different browser extension. Try disabling all of them.
Here is the log:
Refused to load the font '<URL>' because it violates the following Content Security Policy directive: "default-src 'self' blob:". Note that 'font-src' was not explicitly set, so 'default-src' is used as a fallback.
register-root-sw.js:17 Registered root service worker on editor.construct.net
2root-sw.js:273 [Root-SW-Offline] Up to date
main.js:1 Failed to load resource: the server responded with a status of 400 ()
htmlimports.js:1 [HTMLImports] Unable to add import 'components/bars/propertiesBar/propertiesBar.html': Event
(anonymous) htmlimports.js:1
editor.construct.net/:1 Uncaught (in promise) Event
main.js:1 Failed to load resource: the server responded with a status of 400 ()
htmlimports.js:1 [HTMLImports] Unable to add import 'components/misc/midPane/midPane.html': Event
(anonymous) htmlimports.js:1
main.js:1 Failed to load resource: the server responded with a status of 400 ()
htmlimports.js:1 [HTMLImports] Unable to add import 'components/bars/projectBar/projectBar.html': Event
(anonymous) htmlimports.js:1
main.js:1 Failed to load resource: the server responded with a status of 400 ()
htmlimports.js:1 [HTMLImports] Unable to add import 'components/bars/layersBar/layersBar.html': Event
(anonymous) htmlimports.js:1
main.js:1 Failed to load resource: the server responded with a status of 400 ()
htmlimports.js:1 [HTMLImports] Unable to add import 'components/bars/tilemapBar/tilemapBar.html': Event
(anonymous) htmlimports.js:1
main.js:1 Failed to load resource: the server responded with a status of 400 ()
htmlimports.js:1 [HTMLImports] Unable to add import 'components/bars/zOrderBar/zOrderBar.html': Event
(anonymous) htmlimports.js:1
main.js:1 Failed to load resource: the server responded with a status of 400 ()
htmlimports.js:1 [HTMLImports] Unable to add import 'components/bars/bookmarksBar/bookmarksBar.html': Event
(anonymous) htmlimports.js:1
main.js:1 Failed to load resource: the server responded with a status of 400 ()
main.js:1 Failed to load resource: the server responded with a status of 400 ()
htmlimports.js:1 [HTMLImports] Unable to add import 'components/misc/tourController/tourController.html': Event
(anonymous) htmlimports.js:1
htmlimports.js:1 [HTMLImports] Unable to add import 'components/bars/findReferencesBar/findReferencesBar.html': Event
(anonymous) htmlimports.js:1
main.js:1 Failed to load resource: the server responded with a status of 400 ()
htmlimports.js:1 [HTMLImports] Unable to add import 'components/misc/buyNowPage/buyNowPage.html': Event
(anonymous) htmlimports.js:1
main.js:1 Failed to load resource: the server responded with a status of 400 ()
htmlimports.js:1 [HTMLImports] Unable to add import 'components/bars/findResultsBar/findResultsBar.html': Event
(anonymous) htmlimports.js:1
main.js:1 Failed to load resource: the server responded with a status of 400 ()
htmlimports.js:1 [HTMLImports] Unable to add import 'components/misc/startPage/startPage.html': Event
(anonymous) htmlimports.js:1
main.js:1 Failed to load resource: the server responded with a status of 400 ()
htmlimports.js:1 [HTMLImports] Unable to add import 'components/misc/userAccount/userAccount.html': Event
(anonymous) htmlimports.js:1
main.js:1 Failed to load resource: the server responded with a status of 400 ()
main.js:1 Failed to load resource: the server responded with a status of 400 ()
htmlimports.js:1 [HTMLImports] Unable to add import 'components/bars/timelineBar/timelineBar.html': Event
(anonymous) htmlimports.js:1
htmlimports.js:1 [HTMLImports] Unable to add import 'components/misc/mainMenu/mainMenu.html':