dianimation on "[Plugin: Jigoshop] Manually entering a quantity in cart doesn't work"

Hi all! There is a problem with updating the number of products in the cart manually. Everything works fine by increasing or decreasing the number with the arrows beside the number. But entering a number manually causes an error and doesn't always update the cart. (Sometimes it works, sometimes not. Couldn't figure out, why. It seems as it would work every second to third time, I tried …)

If a coupon is active, then I get an error, that the coupon isn't right or out of date. When no coupon is active, no error, but no change of product number or price in cart.

I did switch to your theme, no change.
I deactivated all coupons, no change.
I tried in different browsers, no change.

Please for help! Thanks

### WordPress Environment ###

Home URL: http://localhost:8888/ginsenginfo
Site URL: http://localhost:8888/ginsenginfo
Jigoshop Version: 1.17.15
Jigoshop Database Version: 1503180
Log Directory Writable: ✕ To allow logging
make /Volumes/daten/di_cms/ginsenginfo/wp-content/uploads/jigoshop-logs/ writable or define a custom JIGOSHOP_LOG_DIR.

WP Version: 4.5.2
WP Multisite: –
WP Memory Limit: 96 MB
WP Debug Mode: –
Language: de_DE

### Server Environment ###

Server Info: Apache/2.2.29 (Unix) mod_wsgi/3.5 Python/2.7.10 PHP/5.6.10 mod_ssl/2.2.29 OpenSSL/0.9.8y DAV/2 mod_fastcgi/2.4.6 mod_perl/2.0.9 Perl/v5.22.0
PHP Version: 5.6.10
PHP Post Max Size: 32 MB
PHP Time Limit: 30
PHP Max Input Vars: 1000
SUHOSIN Installed: –
MySQL Version: 5.5.42
eAccelerator: ✕
APC: ✕
OpCache: ✕
Short Open Tag:
Allow URL fopen:
Session:
Cookie Path: /
Save Path: /Applications/MAMP/tmp/php
Use Cookies:
Use Only Cookies:
Max Upload Size: 32 MB
Default Timezone is UTC:
fsockopen/cURL:
SoapClient:
Remote Post:
Remote Get:

### Server Locale ###

decimal_point: .
thousands_sep: k.A.
mon_decimal_point: k.A.
mon_thousands_sep: k.A.

### Active Plugins (17) ###

Admin Menu Editor: by Janis Elsts – 1.6.2
Admin Columns: by AdminColumns.com – 2.5.6.2
Toolset CRED: by OnTheGoSystems – 1.6
Email Address Encoder: by Till Krüss – 1.0.5
Jigoshop Easy Print Button: by Jigoshop – 3.0
Jigoshop: by Jigoshop Ltd – 1.17.15
Toolset Layouts: by OnTheGoSystems – 1.6
Relevanssi: by Mikko Saari – 3.5.3
Toolset Types: by OnTheGoSystems – 2.0.1
WP-Mail-SMTP: by Callum Macdonald – 0.9.5
WP Media folder: by Joomunited – 3.5.6
WP Menu Cart: by Jeremiah Prummer
Ewout Fehout – 2.5.7

Nested Pages: by Kyle Phillips – 1.5.4
wp-Typography: by Peter Putzer – 3.2.7
Toolset Views: by OnTheGoSystems – 2.0
WPForms Lite: by WPForms – 1.2.2.2
WordPress Zero Spam: by Ben Marshall – 2.1.1

### Settings ###

Taxes Enabled: –
Shipping Enabled: –
Force SSL: –
Currency: EUR (€)
Currency Position: right_space
Thousand Separator: .
Decimal Separator: ,
Number of Decimals: 2

### Jigoshop Pages ###

Shop Base: #350 - /shop/
Warenkorb: #351 - /ginseng-shop/warenkorb/
Zur Kasse: #357 - /ginseng-shop/kasse/
Bezahlen: #358 - /ginseng-shop/bezahlen/
Thanks: #359 - /ginseng-shop/danke/
Mein Benutzerkonto: #353 - /my-account/
Edit Address: #354 - /my-account/edit-address/
Bestellung anzeigen: #356 - /my-account/view-order/
Passwort ände: #355 - /my-account/change-password/
Track Order: #352 - /my-account/order-tracking/
Terms: Page not set

### Taxonomies ###

Product Types: configurable (configurable)
downloadable (downloadable)
exteal (exteal)
grouped (grouped)
simple (simple)
virtual (virtual)

### Theme ###

Name: Toolset Starter
Version: 1.3.7
Author URL: http://www.onthegosystems.com/
Child Theme: ✕ – If you're modifying Jigoshop or a parent theme you didn't build personally we recommend using a child theme. See: How to create a child theme
Jigoshop Support: Not Declared

### Templates ###

Overrides: toolset-starter/index.php

https://wordpress.org/plugins/jigoshop/