Assertion Failed: sokol

[wocan23]

V version:
0.4.0
UI version:
0.0.4
OS:
Windows Server 2016
What did you do?

struct App {
	mut:
	window     &ui.Window = unsafe { nil }
	first_name string
	last_name  string
}

fn main() {
	mut app := &App{}
	app.window = ui.window(
		width: 600
		height: 400
		title: 'V UI Demo'
		children: [
			ui.row(
				margin: ui.Margin{10, 10, 10, 10}
				children: [
					ui.column(
						width: 200
						spacing: 13
						children: [
							ui.textbox(
								max_len: 20
								width: 200
								placeholder: 'First name'
								text: &app.first_name
							),
							ui.textbox(
								max_len: 50
								width: 200
								placeholder: 'Last name'
								text: &app.last_name
							),
						]
					),
				]
			),
		]
	)
	ui.run(app.window)
}

What did you expect to see?

What did you see instead?

/