Hi,
It’s very common for many web hosts to not successfully import media with the WordPress importer, it doesn’t always work, no matter the theme.
What I always do:
1) import with “download media attachments checked” – this usually does import the images, but doesn’t import the pages/posts/etc
2) do another import, WITHOUT checking the option in step 1) (to get the rest of the content)
Also, take a look – you have an error about Contact Form 7 (last one) => you first need to install that plugin, and only then import content for it. This applies to WooCommerce/Revolution Slider as well.
Regards,
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Cosmin – Support