REST API on Multisite causes Server Error 500

Hey there,

I have a multisite running 4.7.2.

When trying to access https://site.com/wp-json I get 404.

When trying to access https://site.com/wp-json/, I get Internal Server Error 500.

When I researched, I found that the 500 was essentially being caused due to way too many redirects, as presumably, either the redirect to wp-json/ wasn’t being found or redirect wasn’t working correctly.

[Sun Feb 12 19:45:46 2017] [error] Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.
[Sun Feb 12 19:45:46 2017] [debug] core.c(3093): [client 66.187.239.11] r->uri = /wp-json/
[Sun Feb 12 19:45:46 2017] [debug] core.c(3099): [client 66.187.239.11] redirected from r->uri = /wp-json/
[Sun Feb 12 19:45:46 2017] [debug] core.c(3099): [client 66.187.239.11] redirected from r->uri = /wp-json/

And my .htaccess:

RewriteEngine On
RewriteBase /

<IfModule mod_deflate.c>
    <filesMatch "\.(js|css|html|php)$">
        SetOutputFilter DEFLATE
    </filesMatch>
</IfModule>

# Rewrite www.domain.com to domain.com
# RewriteCond %{HTTP_HOST} ^www\.(.*)
# RewriteRule ^(.*) https://%1/$1 [R,L]
RewriteCond %{HTTP_HOST} !^$
RewriteCond %{HTTP_HOST}  ^www\.(.*) [NC]
RewriteRule ^(.*)$  https://%1/$1 [R=301,L]

#uploaded files
RewriteRule ^(.*/)?files/$ index.php [L]
RewriteRule ^(.*/)?files/(.*) wp-includes/ms-files.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteCond %{REQUEST_URI} ^.*/wp-admin$
RewriteRule ^(.+)$ /$1/ [R=301,L]

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

Any clue how to fix this?