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When you do not in fact have any idea what you are doing please do NOT make assertions about you "fixing" anything on a public ticket. Other people are reading this and will follow your bad advice, exposing their sites to danger. You did not fix anything, really, you broke one thing and removed another. What you removed made a difference — but you could have done that far more safely, without breaking ANYTHING else, using the .htaccess Maker options.

Let's take this step by step

Thing broken #1

What you actually did was screw up the IndexIgnore rule and remove the Options rule. 

The original rule

IndexIgnore *

literally means that all files and folders should be excluded from the automatically generated directory index, in case we cannot set the -Indexes flag in Options (this rule would cause Apache to produce an empty listing in this case). Apache Documentation: https://httpd.apache.org/docs/2.4/mod/mod_autoindex.html#indexignore

What you did was change that line to say that Apache should not put the following files into the automatic index:

• Files whose name ends with the literal string Options
• Files named -Indexes
• Files named +SymLInksIfOwnerMatch

By messing up the rule you have now re-enabled Apache's behaviour of producing a directory listing of your directories.

Thing removed #2

You completely removed the Options line. Apache Documentation: https://httpd.apache.org/docs/2.4/mod/core.html#options This line was trying to completely disable automatic directory indices and tell Apache to only follow symlinks if it's safe to do so (the symlink target's owner matches the user the Apache request runs under, i.e. you can no longer use a symlink to read a system file you are otherwise disallowed to).

The latter feature is not supported on all servers. That's why the .htaccess maker option to control it comes with a clear warning “(may cause a blank page or 500 Internal Server Error)” in its name ;)

Correct steps to fix your issue

Everything in the .htaccess file is controlled by options in the .htaccess Maker settings. The settings you are looking for are:

• Disable directory listings (recommended): set this to Yes; it should already be set to Yes
• Follow symlinks (may cause a blank page or 500 Internal Server Error): set this to “Server Default”

Click on Save & Create .htaccess. Done.