Flex pages do not load on Windows

[lufog]

When flex-pages are enabled, pages do not load.

Info:

Windows 10 x64
PHP v7.4.0 (on built in server)
Grav v1.7.0-rc.2
Admin v1.10.0-rc.2

All tests were performed on a clean installation.

[OleVik]

Do you get any errors in your browser's console?

[lufog]

Yes, there is one error.

On Google Chrome

Uncaught TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at ReLoad (index.js?9c32:50)
    at Module.eval (index.js?9c32:91)
    at eval (index.js:123)
    at Module../app/columns/index.js (flex-objects.js?c268a8f3b6:109)
    at __webpack_require__ (flex-objects.js?c268a8f3b6:20)
    at eval (main.js?f161:1)
    at Module../app/main.js (flex-objects.js?c268a8f3b6:312)
    at __webpack_require__ (flex-objects.js?c268a8f3b6:20)
    at flex-objects.js?c268a8f3b6:84

On Firefox

TypeError: can't convert undefined to object flex-objects.js:79:30
    ReLoad index.js:50
    <anonymous> index.js:91
    <anonymous> index.js:123
    js flex-objects.js:109
    __webpack_require__ flex-objects.js:20
    <anonymous> main.js:1
    js flex-objects.js:312
    __webpack_require__ flex-objects.js:20
    <anonymous> flex-objects.js:84
    <anonymous> flex-objects.js:87

[lufog]

Yep, in Grav v1.7.0-rc.3 this problem is fixed.