Steps to reproduce the issue

install Joomla 4
Add menu item to Smart Search with all default config
visit menu item on frontend

Expected result

A search page

Actual result

500

Additional comments

Enabling development error reporting and debugging I get stack trace

which leads to /components/com_finder/src/View/Search/HtmlView.php line 146

// Check for errors.
		if (count($errors = $this->get('Errors')))
		{
			throw new GenericDataException(implode("\n", $errors), 500);
		}

Those errors are never handled and shown to the screen but var_dump($errors); gives:

Warning: mysqli_stmt::bind_param(): Number of variables doesn't match number of parameters in prepared statement in /application/libraries/vendor/joomla/database/src/Mysqli/MysqliStatement.php on line 420

Warning: mysqli_stmt::bind_param(): Number of variables doesn't match number of parameters in prepared statement in /application/libraries/vendor/joomla/database/src/Mysqli/MysqliStatement.php on line 420

Warning: mysqli_stmt::bind_param(): Number of variables doesn't match number of parameters in prepared statement in /application/libraries/vendor/joomla/database/src/Mysqli/MysqliStatement.php on line 420
array(3) { [0]=> string(0) "" [1]=> string(0) "" [2]=> string(0) "" }