First of all: you are using an outdated version of the theme. We fixed all warnings already in one of the latest updates. As soon as you update to the current version all warnings will disappear.
Second: All things regarding the theme were only warnings, meaning the theme is working without any problem, because a warning is only a warning. Only an error or critical error can crash your website. But the biggest problem is that these messages are visible on your website, because a hacker can provoke such kinds of messages and hack your website. These information are only for developers and should always be turned off on a public website.