VW Kids Pro – Demo Content Importer not working

Hi There,
I followed the steps as mentioned in the documentation
up to point 4th point it worked fine
in 5th step “Demo Content Importer”

when trying to do bellow steps
“Before Run Importer you have to install all the required Plugins :- Woocommerce, Contact Form 7, Instagram Feed and VW kids Pro Posttype Plugin”

It gave me the error “PCLZIP_ERR_BAD_FORMAT (-10): Unable to find End of Central Dir Record signature”

Then I installed both plugins via the plugin tool.

but “Run Importer” seems to do nothing rather reloading the page.

Highly appreciate if could you can help