We're using the light/dark theme switcher in V.5. Whenever we call DialogService.Alert() the given message is rendered dark in dark mode.
As a result, the text is not readable on dark backround color.
The title does use light color in dark mode as expected.
You should probably use RadzenLayout as it specifies rules for changing the global text color in dark mode. Just put it in your MainLayout.razor file to wrap all content.
Little follow up problem:
When I do use the Radzenlayout wrapper and page content is larger (vertical size) as visible browser view, no vertical scrollbars are shown anylonger. Without wrapper they do.
How can I enable vertical scrollbars (on demand) using the RadzenLayout wrapper?