CalendarExtender not displayed properly

[VandanaSankhayan]

The AJAX Control Toolkit \20.1.0

The installation method

• [x] NuGet package

Minimal steps to reproduce the bug

Just one step. Adding caledarextendar to a textbox is shown over the webpage text giving an impresssion that the css is not loaded/working

Actual result

Calendar displayed badly

Expected result

Calendar text displayed correctly with white or custom background color

Browser(s) used

Google Chrome

A site deployment method

• [x] IIS