Hi,
Thanks for trying out my plugin. I’m sorry it doesn’t work for you at the moment. I’ve quickly tried it on an older (WordPress 3.4.2) Multisite development installation which I have access to. It also uses sub-folders and I could not reproduce the issue you mention. The plugin should always go to the subsite url in a Multisite installation and NOT the main Multisite site.
These are the steps I’ve taken tot test this:
1. Network activate plugin in the Network Admin -> Plugins interface
2. Logout
3. Visit the main site
4. Type in your brower’s address bar: https://mysite.ext/wp-admin or https://mysite.ext/wp-login.php
5. Login with your credentials
6. You’re redirected to the main site (which I was visiting)
Now with a subsite (using the subfolder configuration)
1. Visit a subfolder site called subsonic
2. Type in your brower’s address bar: https://mysite.ext/subsonic/wp-admin or https://mysite.ext/subsonic/wp-login.php
5. Login with your credentials
6. You’re redirected to the subsonic site (which I was visiting)
Btw my user is has a superadmin role.
Can you tell me if you’ve performed the same actions? What version of WordPress are you using? Have you tried to disable all other plugins temporarily and use the default out-of-the box WordPress theme (Twenty-Eleven or newer) to see if any other plugin or the theme you’re using might cause this?
If you can provide me with the answers on the above question I might be able to help you solve this.