telephag on "[Plugin: TheCartPress eCommerce Shopping Cart] Widget areas in Dashboard not open-able when theCartPress is active"

I'm investigating an issue for a client. The site is running WordPress 4.4.3 and theCartPress 1.4.9.1.

When theCartPress plugin is active, widget areas don't open (disclosure arrows are non-responsive and I see the following JavaScript errors in the console:

[Error] TypeError: jQuery( 'ul#widget-customvalues-widget-__i__-tcp_custom_field_list' ).sortable is not a function. (In 'jQuery( 'ul#widget-customvalues-widget-__i__-tcp_custom_field_list' ).sortable', 'jQuery( 'ul#widget-customvalues-widget-__i__-tcp_custom_field_list' ).sortable' is undefined) global code (widgets.php:3559)
[Error] TypeError: jQuery( '.tcp-date-picker' ).datepicker is not a function. (In 'jQuery( '.tcp-date-picker' ).datepicker( { dateFormat : 'yy-mm-dd', showOn : 'both', buttonText : '<i class="dashicons dashicons-calendar-alt"></i>', } )', 'jQuery( '.tcp-date-picker' ).datepicker' is undefined) (anonymous function) (tcp_admin_scripts.js:282) j (load-scripts.php:2:27315) fireWith (load-scripts.php:2:28124) ready (load-scripts.php:2:29968) J (load-scripts.php:2:30328)
[Error] TypeError: undefined is not an object (evaluating 'e.hasClass') (anonymous function) (load-scripts.php:638:1534) dispatch (load-scripts.php:4:8555) handle (load-scripts.php:4:5258) trigger (load-scripts.php:4:7656) trigger (load-scripts.php:8:6737) (anonymous function) (load-scripts.php:4:15525) each (load-scripts.php:2:2980) each (load-scripts.php:2:840) trigger (load-scripts.php:4:15498) (anonymous function) (load-scripts.php:637:2925) j (load-scripts.php:2:27315) fireWith (load-scripts.php:2:28124) x (load-scripts.php:5:22123) b (load-scripts.php:5:26032)

Short of disabling theCartPress (not an option), is there a solution to this issue? Is this a known issue that's been fixed in theCartPress 1.4.9.6?

https://wordpress.org/plugins/thecartpress/