Preview Post Not Working / .htaccess updates

Hello,

I’m using the Sela theme over at https://www.postcardsfromablonde.com and I cannot get the preview post option to work. Instead, I get:

OOPS! THAT PAGE CAN’T BE FOUND.

It looks like nothing was found at this location. Maybe try one of the links below or a search?

I read that I need to update my .htaccess. So, I went to my server (iPage) and updated the .htaccess folder to

# BEGIN W3TC Browser Cache
<IfModule mod_deflate.c>
<IfModule mod_headers.c>
Header append Vary User-Agent env=!dont-vary
</IfModule>
AddOutputFilterByType DEFLATE text/css text/x-component application/x-javascript application/javascript text/javascript text/x-js text/html text/richtext image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon application/json
<IfModule mod_mime.c>
# DEFLATE by extension
AddOutputFilter DEFLATE js css htm html xml
</IfModule>
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

But it’s still not working.

I do not know much about coding (read: nothing) or html (also next to nothing). So I’m not sure what I’m doing wrong. I just want to preview the post so I can begin to schedule them.

Thanks for your help!