Update:
I contacted my hosting service and they said the error log shows:
PHP Parse error: syntax error, unexpected ‘;’ in /home/johninaz/public_html/carverstl/wp-content/themes/full-frame/inc/fullframe-default-options.php on line 728
The hosting service (Bluehost) said the theme was causing the issue (from my deletions, no doubt) and that I should contact the theme provider to fix the issue.
Hope to hear from you soon!