error 500 code

I’ve already deactivated the plug in’s through ftp. I cannot access the wordpress dashboard. The website is https://www.nesasales.com

If you have FTP access then try renaming .htaccess to .htaccess-old and see if you can get in after that.

Thank you, but unfortunately I am still getting an error. I replaced the .htaccess to .htaccess-old in the main public folder. I appreciate that, anything else?

I’ve already deactivated the plug in’s through ftp….
I replaced the .htaccess to .htaccess-old in the main public folder…

If that does not resolve the issue, try switching to the default theme (Twenty Sixteen, etc.) to rule-out a theme-specific issue. If you don’t have access to your admin panel, access your server via SFTP or FTP, or a file manager in your hosting account’s control panel, navigate to /wp-content/themes/ and rename the directory of your currently active theme. This will force the default theme to activate and hopefully rule-out a theme-specific issue.

If you weren’t able to resolve the issue by either resetting your plugins and theme or renaming your .htaccess file, we may be able to help, but we’ll need a more detailed error message. Internal server errors are usually described in more detail in the server error log. If you have access to your server error log, generate the error again, note the date and time, then immediately check your server error log for any errors that occurred during that time period. If you don’t have access to your server error log, ask your hosting provider to look for you.

We are using a custom theme that I did not make. I renamed the custom theme to nesa_deactivate. I went to login and still the same 500 error.
This is the error message in the error log.

[Mon Aug 08 04:32:59 2016] [alert] [client 24.39.176.110] /home/nesainc/.htaccess: Invalid command ‘Add’, perhaps misspelled or defined by a module not included in the server configuration

That is the same error message I have received every time I have tried to login or access the website.

Any help will be greatly appreciated.

This is what my .htaccess file consists of
# BEGIN WordPress
<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

If you have access to your server error log, generate the error again, note the date and time, then immediately check your server error log for any errors that occurred during that time period. If you don’t have access to your server error log, ask your hosting provider to look for you.

If you cannot find error logs or if you don’t find any helpful info in the error logs, try Enabling debugging

Thank you, it was all set.

Glad to hear it ??