Steps to reproduce the issue

Create the admin menu link with array parameter in component manifest file.

I.e. the link to display component-specific plugins:

			<menu
					link="option=com_foo&amp;view=plugins&amp;filter[folder]=foo"
					view="plugins"
					img="class:plug"
					alt="Foo/Plugins"
			>
				com_foo_plugins
			</menu>

Next try to create new menu item for backend menu.

Expected result

No errors.

Actual result

( ! ) Warning: strlen() expects parameter 1 to be string, array given in \administrator\components\com_menus\models\menutypes.php on line 455

System information (as much as possible)

Not related.

Additional comments