Unable to view my network admin dashboard

Hi,

At present I am working on multisite network.

I am can able to login into my dashboard. But when I am trying view my network admin dashboard it was showing loading, after few minutes I am getting an error like below

The staging.mylocalnews.us page isn’t working

staging.mylocalnews.us redirected you too many times.
Try:
Reloading the page
Clearing your cookies
ERR_TOO_MANY_REDIRECTS

Can you please help me out.

Here is my .htaccess code

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ – [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]

Thanks,
Krishna Kanth