Multisite subdirectory infinite redirect loop

Hi, my multisite with subdirectory setup is working fine before I updated to WP 4.3 for subsites without mapped domain (e.g. http://hostjoints.com/b2bshop/). But now it goes on infinite redirect loop whenever I access the dashboard (e.g. http://hostjoints.com/b2bshop/wp-admin ).

Below is the error message:

This webpage has a redirect loop

ERR_TOO_MANY_REDIRECTS

Note: NO issues when accessing wp-admin on sites with mapped domains.

Regards,

Bloggista