I was trying to learn how to modify Spirit using your

I was trying to learn how to modify Spirit using your tutorial. I got a fatal error:
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 302535 bytes) in /home/pgrd/public_html/wp-content/themes/upfront/library/class_upfront_codec.php on line 192

Now I can't get into the site ...

Help?