Fixer theme not saving changes

For some reason, Fixer is not saving on a brand new WordPress install. This is the error.
There has been an error saving your changes

Additional Details:
1. Checked PHP memory_limit and it was set to 256M.
2. Added the following .htaccess code.

<IfModule mod_security.c>
SecFilterRemove 00318
</IfModule>

3. Site does not have any caching plugins installed.
4. Site is hosted with BlueHost.

Support access is enabled. Suggestions?