404 Redirects

I have a WordPress site where https://www.whalencpa.com/wp-admin/post-new.php is getting redirected to the 404 page. Per the hosting company, iThemes Security is doing that, but I’m not able to figure out how its occuring or how to fix it. Here’s what’s in the htaccess file:

# BEGIN iThemes Security - Do not modify or remove this line
# iThemes Security Config Details: 2
	# Ban Hosts - Security > Settings > Banned Users
	SetEnvIF REMOTE_ADDR "^137\.117\.178\.120$" DenyAccess
	SetEnvIF X-FORWARDED-FOR "^137\.117\.178\.120$" DenyAccess
	SetEnvIF X-CLUSTER-CLIENT-IP "^137\.117\.178\.120$" DenyAccess

	<IfModule mod_authz_core.c>
		<RequireAll>
			Require all granted
			Require not env DenyAccess
			Require not ip 137.117.178.120
		</RequireAll>
	</IfModule>
	<IfModule !mod_authz_core.c>
		Order allow,deny
		Allow from all
		Deny from env=DenyAccess
		Deny from 137.117.178.120
	</IfModule>
# END iThemes Security - Do not modify or remove this line