[SmartCrawl Pro] Compilation failed: invalid range in character class

Hi,

on post edit page, before "Copy as concept – Remove – Publish button" I have hundreds of lines of error code like:

<b>Warning</b>: preg_match(): Compilation failed: invalid range in character class at offset 4 in <b>/domain.tld/wp-content/plugins/wpmu-dev-seo/includes/external/simple_html_dom.php</b> on line <b>1364</b><br />

<br />

<b>Warning</b>: preg_match(): Compilation failed: invalid range in character class at offset 4 in <b>/domain.tld/wp-content/plugins/wpmu-dev-seo/includes/external/simple_html_dom.php</b> on line <b>1364</b><br />

<br />

<b>Warning</b>: preg_match(): Compilation failed: invalid range in character class at offset 4 in <b>/domain.tld/wp-content/plugins/wpmu-dev-seo/includes/external/simple_html_dom.php</b> on line <b>1364</b><br />

<br />

<b>Warning</b>: preg_match(): Compilation failed: invalid range in character class at offset 4 in <b>/domain.tld/wp-content/plugins/wpmu-dev-seo/includes/external/simple_html_dom.php</b> on line <b>1364</b><br />

Please how to fix it?

Thanks,

Jiri