GPP 1.4 alpha2 - Fatal Error

Hi Tom,

After clicking on a tag in a post, I get the following fatal error:

Fatal error: Uncaught Error: Call to undefined function is_singlular() in C:\xampp714\htdocs\svlabs3\wp-content\plugins\gp-premium\page-header\functions\functions.php:152 Stack trace: #0 C:\xampp714\htdocs\svlabs3\wp-content\plugins\gp-premium\page-header\functions\functions.php(31): generate_page_header_get_options() #1 C:\xampp714\htdocs\svlabs3\wp-includes\class-wp-hook.php(298): generate_page_header_do_setup(Object(WP)) #2 C:\xampp714\htdocs\svlabs3\wp-includes\class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array) #3 C:\xampp714\htdocs\svlabs3\wp-includes\plugin.php(515): WP_Hook->do_action(Array) #4 C:\xampp714\htdocs\svlabs3\wp-includes\class-wp.php(746): do_action_ref_array('wp', Array) #5 C:\xampp714\htdocs\svlabs3\wp-includes\functions.php(955): WP->main('') #6 C:\xampp714\htdocs\svlabs3\wp-blog-header.php(16): wp() #7 C:\xampp714\htdocs\svlabs3\index.php(17): require('C:\\xampp714\\htd...') #8 {main} thrown in C:\xampp714\htdocs\svlabs3\wp-content\plugins\gp-premium\page-header\functions\functions.php on line 152

This happens with and without any page headers active.

Local XAMPP install (PHP 7.1.4) on Win 10.

Cheers!
Lyle