I'm having trouble with .htaccess on my Apache 2.4 server.

I’m sorry if this is obvious. The following code seems to match what is required to allow anyone to access index.html in the same directory, block visitor direct access to other files, and allow index.html to call other files in this directory, on this public server.

But it returns a misconfiguration error as if it is not accessible:

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.

If I comment  it out, I can access index.html just fine.

What am I doing wrong?  Thank you!

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# Deny access to everything by default
Order deny, allow
Deny from all

# Require local #doesn't seem to work april 27 2024

Allow from 127.0.0.1
Allow from ::1
Allow from localhost

# Allow access to specific files
<Files "index.html">
    Allow from all
</Files>