Widget conflict with widget.php

Hi,

I made the upgrade of Ultimate Post Widget to 2.0.3 version.
Since then, there are a conflict with the widget.php page.

I need to desactivate the widget to restore the widget.php.
The problem is that widget.php turns to blank page.

Some idea?

Regards
Alberto

https://ww.wp.xz.cn/plugins/ultimate-posts-widget/