When an element that supports the SVG features added in Elementor 2.6 has a SVG graphic/icon added from the Media Library and later the graphic is deleted from outside Elementor, the below error will show in the place where the icon is supposed to be when PHP warnings are enabled:
<div class="elementor-icon">
<b>Warning</b>: file_get_contents(): Filename cannot be empty in <b>\wp-content\plugins\elementor\core\files\assets\svg\svg-handler.php</b> on line <b>120</b>
</div>
Additionally the left sidebar where a preview of the SVG should show up is broken as well, looks like the HTML for the whole page gets rendered in that box as a result of the PHP warning and there are a whole bunch of other side-effects like broken scripts and fonts in the Elementor editor as a result.
When an element that supports the SVG features added in Elementor 2.6 has a SVG graphic/icon added from the Media Library and later the graphic is deleted from outside Elementor, the below error will show in the place where the icon is supposed to be when PHP warnings are enabled:
Additionally the left sidebar where a preview of the SVG should show up is broken as well, looks like the HTML for the whole page gets rendered in that box as a result of the PHP warning and there are a whole bunch of other side-effects like broken scripts and fonts in the Elementor editor as a result.