Invalid RSS Feed

My feed for my blog (SayTheBlessing.com) isn’t showing up in some RSS readers, like BlogLovin, and when I went to validate my RSS feed on https://validator.w3.org/ it said I had 16 errors and 1 warning. The errors are:
Line 273, Column 135: Element link is missing required attribute property.
Line 277, Column 31: End tag p implied, but there were open elements.
Error Line 271, Column 98: Unclosed element code.
Line 271, Column 92: Unclosed element strong.
Line 271, Column 58: Unclosed element span.
Line 278, Column 23: Element div not allowed as child of element code in this context. (Suppressing further errors from this subtree.)
Line 285, Column 24: Element div not allowed as child of element code in this context. (Suppressing further errors from this subtree.)
Error Line 294, Column 24: Element div not allowed as child of element code in this context. (Suppressing further errors from this subtree.)
Line 295, Column 6: End tag div seen, but there were open elements.
Line 301, Column 23: Stray end tag span.
Line 301, Column 27: No p element in scope but a p end tag seen.
Line 512, Column 95: Bad value for attribute action on element form: Must be non-empty.
Line 526, Column 587: The scrolling attribute on the iframe element is obsolete. Use CSS instead.
Line 526, Column 587: The frameborder attribute on the iframe element is obsolete. Use CSS instead.
Line 551, Column 80: Bad value generator for attribute rel on element a: The string generator is not a registered keyword.
Line 553, Column 87: Bad value designer for attribute rel on element a: The string designer is not a registered keyword.

I have the following PlugIns activated: Askimet, JetPack, MOJO, Recipe Card, WOW Slider, WP SlimStat and my theme is Sugar and Spice. PLEASE HELP!