dos not work at all

Hi

i cant get this plug in to work. I cant even opload anything, when i try I cant get to the step 3 and it say this

Warning: Invalid argument supplied for foreach() in /var/www/silkeborgfireworks.dk/public_html/wp-content/plugins/wp-all-import-woocommerce-multistore-add-on/woomultistore-wpai-addon.php on line 108

i have changed anything in the code, and the website is simple, so I dont get way i dons nok work. I tried with a xslx file.

hope you can help me.

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