WooCommerce 3.0.0-RC1 select2 "Loading Failed" wrong message

[leanzafrancesco]

EXPLANATION OF THE ISSUE

When I use a select2 field, the first text shown is "Loading Failed" rather than simply "Loading..."; after some seconds the results show!

STEPS TO REPRODUCE THE ISSUE

Example Video

• go to Product edit page
• Linked Products tab
• in Up-sells write something, like "ship"
• the select2 shows "Loading Failed" at first; after some seconds it shows the results (e.g. "Ship your idea", etc...)

SYSTEM STATUS REPORT

WordPress environment
Home URL:		http://yi-network.dev/woocommerce-update
Site URL:		http://yi-network.dev/woocommerce-update
WC version:		3.0.0
Log directory writable:		 /srv/www/yi-network/htdocs/wp-content/uploads/sites/2/wc-logs/
WP version:		4.7.3
WP multisite:		
WP memory limit:		256 MB
WP debug mode:		
WP cron:		
Language:		en_US
Server environment
Server info:		nginx/1.11.8
PHP version:		7.0.14-2+deb.sury.org~trusty+1
PHP post max size:		1 GB
PHP time limit:		30
PHP max input vars:		1000
cURL version:		7.35.0, OpenSSL/1.0.1f
SUHOSIN installed:		–
Max upload size:		1 MB
Default timezone is UTC:		
fsockopen/cURL:		
SoapClient:		
DOMDocument:		
GZip:		
Multibyte string:		
Remote post:		
Remote get:		
Database
WC database version:		3.0.0
Database prefix	 	wp_2_
woocommerce_sessions	 	
woocommerce_api_keys	 	
woocommerce_attribute_taxonomies	 	
woocommerce_downloadable_product_permissions	 	
woocommerce_order_items	 	
woocommerce_order_itemmeta	 	
woocommerce_tax_rates	 	
woocommerce_tax_rate_locations	 	
woocommerce_shipping_zones	 	
woocommerce_shipping_zone_locations	 	
woocommerce_shipping_zone_methods	 	
woocommerce_payment_tokens	 	
woocommerce_payment_tokenmeta	 	
MaxMind GeoIP database:		 The MaxMind GeoIP Database does not exist - Geolocation will not function. You can download and install it manually from http://dev.maxmind.com/geoip/legacy/geolite/ to the path: /srv/www/yi-network/htdocs/wp-content/uploads/sites/2/GeoIP.dat. Scroll down to "Downloads" and download the "Binary / gzip" file next to "GeoLite Country". Please remember to uncompress GeoIP.dat.gz and upload the GeoIP.dat file only.
Security
Secure connection (HTTPS):		Your store is not using HTTPS. Learn more about HTTPS and SSL Certificates.
Hide errors from visitors		
Active plugins (4)
WooCommerce	 	by Automattic – 3.0.0-rc.1
WordPress Importer	 	by wordpressdotorg – 0.6.3
FL Fast Plugin Search	 	by Leanza Francesco – 1.0.0
TEST	 	by Leanza Francesco – 1.0.0
Settings
API enabled:		
Force SSL:		–
Currency		USD ($)
Currency position		left
Thousand separator		,
Decimal separator		.
Number of decimals		2
Taxonomies: Product types		external (external), grouped (grouped), simple (simple), variable (variable)
WC pages
Shop base:		#4 - /shop/
Cart:		#5 - /cart/
Checkout:		#6 - /checkout/
My account:		#7 - /my-account/
Theme
Name:		Twenty Seventeen
Version:		1.1
Author URL:		https://wordpress.org/
Child theme:		 – If you're modifying WooCommerce on a parent theme you didn't build personally, then we recommend using a child theme. See: How to create a child theme
WooCommerce support:		
Templates
Overrides:	 	–

[manospsyx]

@mikejolley -- the PR doesn't make a difference. Looks like a select2 issue -- see select2/select2#4355

[mikejolley]

@franticpsyx it did in my testing environment

[manospsyx]

Prevented getEnhancedSelectFormatString() from being appended to the select2 args and I get the same behavior but with the hardcoded "failure" string. The object returned by that function is all that #13630 changed.

In any case, this doesn't look like a WC problem anyway. Looks like it might affect specific browser / jQuery versions.

[mikejolley]

Thanks @franticpsyx I'll follow that issue.