Hi There,
The debug.log
file can be found under /html/wp-content/ directory, the error is about Constant WP_MAX_MEMORY_LIMIT already defined
, you might want to remove the WP_MAX_MEMORY_LIMIT you added on the wp_config.php file, the other errors are from gd-system-plugin please ask the GoDaddy support regarding this.
Though it seems those errors are not the cause of the issue as I was able to open your homepage in Cornerstone (see screenshot), the issue seems to be from the AWeber Web Form Generator code you added on your page.
Please split up that codes, place the JavaScripts on the Theme Options > JS. Place the CSS on the Theme Options > CSS and Place the HTML part on a RAW Content element.
Hope it helps,
Cheers!