Error installing Events+ on IIS

As soon as I activate Events+ plugin on site, it creates a redirect loop and can no longer access front-end or wp-admin.

http://fullth+++++++ry.com

Tried installing through Dashboard plugin & manually.

Debug log shows:

[08-May-2018 17:40:11 UTC] PHP Warning: require_once(admin/class-eab-admin.php): failed to open stream: No such file or directory in C:\webs\fullth++ry.com\html\blog\wp-content\plugins\events-and-bookings\events-and-bookings.php on line 143
[08-May-2018 17:40:11 UTC] PHP Fatal error: require_once(): Failed opening required 'admin/class-eab-admin.php' (include_path='.;c:\webs\php\pear') in C:\webs\fullth++ry.com\html\blog\wp-content\plugins\events-and-bookings\events-and-bookings.php on line 143
[08-May-2018 17:43:15 UTC] PHP Warning: require_once(admin/class-eab-admin.php): failed to open stream: No such file or directory in C:\webs\fullth++ry.com\html\blog\wp-content\plugins\events-and-bookings\events-and-bookings.php on line 143
[08-May-2018 17:43:15 UTC] PHP Fatal error: require_once(): Failed opening required 'admin/class-eab-admin.php' (include_path='.;c:\webs\php\pear') in C:\webs\fullth++ry.com\html\blog\wp-content\plugins\events-and-bookings\events-and-bookings.php on line 143

Other plugins install & activate fine.