1) Login issue is not related to our theme because it appears even with the default Storefront theme https://recordit.co/1Hbr8r6Hfa So, try to disable all the third-party plugins and check if it helps. If not then contact WooCommerce support.
2) I don’t see issues with the footer and actually, I don’t see a black footer like on your screenshot.
3) Go to Theme Options > Mobile panel and set different colors for the mobile background color and icons color. Now it’s white for both https://prnt.sc/W0mSwwI542XT
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