I see these errors on your dashboard –
Fatal error: Allowed memory size of 41943040 bytes exhausted (tried to allocate 12288 bytes) in /home/xxxxx/public_html/portfolio/wp-includes/SimplePie/IRI.php on line 918
and
Uncaught TypeError: Cannot read property ‘plugins’ of undefined –
jquery.flot.selection.js:40
Can you pls disable a few plugins and see if that helps? You can also ask your provider to increase the memory allocated. Hope this helps.
BTW, I was able to set featured image on your Hello World post without any issues.