davisnz on "[Plugin: WP Pipes] SimpleXMLElement::xpath()"

Hello, I'm loving this plugin but I'm getting an error everytime I try to set up my rss to post.. This is what I'm getting:

Warning: SimpleXMLElement::xpath() [simplexmlelement.xpath]: Invalid predicate in /PATH/plugins/wp-pipes/includes/form/form.php on line 1473

Warning: SimpleXMLElement::xpath() [simplexmlelement.xpath]: xmlXPathEval: evaluation failed in /PATH/plugins/wp-pipes/includes/form/form.php on line 1473

This is what I'm doing:

[so] title => [di] title
[so] link => [di] excerpt
[so] date => [di] date

Processor: slug

[so] tittle => pi[0] text ; po[0] slug => [di] slug

Full Text

[so] link => po [1] url ; po [1] Full Text => [di] content

Get Images

[po] 1 full_html => pi [2] html ; po [2] images undefined => [di] images

Any help please?

https://wordpress.org/plugins/wp-pipes/