Header Liquid - Debut #2- Missing width & height Attributes

[JEHN]

It says I am missing width & height attributes. Gift Card liquid also says the same thing. Is this something I can fix? If so how?

In my Search Liquid -it says - Attempting to close Html/Element 'div' before Liquid Tag 'paginate' was closed.

Theme Liquid - says - Attempting to close HTML/Element 'body' was closed.

Can I also fix these myself and if so how?

Thanks