Unable to edit products – 3.0.0

Upgraded to WooCommerce 3.0.0 and now I cannot edit products. When on a product edit page, clicking “variations” (for example) produces no result. I see this in the error console:

select2.min.js?ver=3.4.5:21 Uncaught Error: Option 'ajax' is not allowed for Select2 when attached to a <select> element.
    at String.<anonymous> (select2.min.js?ver=3.4.5:21)
    at Function.each (load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,jquery-ui-core,jquery-ui-widget,jquery-ui-mo…:2)
    at d.prepareOpts (select2.min.js?ver=3.4.5:21)
    at d.prepareOpts (select2.min.js?ver=3.4.5:22)
    at d.init (select2.min.js?ver=3.4.5:21)
    at HTMLSelectElement.<anonymous> (select2.min.js?ver=3.4.5:22)
    at Function.each (load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,jquery-ui-core,jquery-ui-widget,jquery-ui-mo…:2)
    at a.fn.init.each (load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,jquery-ui-core,jquery-ui-widget,jquery-ui-mo…:2)
    at a.fn.init.a.fn.select2 (select2.min.js?ver=3.4.5:22)
    at HTMLSelectElement.<anonymous> (wc-enhanced-select.min.js?ver=3.0.0:1)

System report:

### WordPress Environment ###

Home URL: https://tac.sterndata.com
Site URL: https://tac.sterndata.com
WC Version: 3.0.0
Log Directory Writable: ?
WP Version: 4.7.3
WP Multisite: –
WP Memory Limit: 256 MB
WP Debug Mode: –
WP Cron: ?
Language: en_US

### Server Environment ###

Server Info: Apache/2.4.25 (CentOS) OpenSSL/1.0.1e-fips PHP/7.0.17
PHP Version: 7.0.17
PHP Post Max Size: 72 MB
PHP Time Limit: 300
PHP Max Input Vars: 1800
cURL Version: 7.29.0
NSS/3.21 Basic ECC

SUHOSIN Installed: –
Max Upload Size: 18 MB
Default Timezone is UTC: ?
fsockopen/cURL: ?
SoapClient: ?
DOMDocument: ?
GZip: ?
Multibyte String: ?
Remote Post: ?
Remote Get: ?

### Database ###

WC Database Version: 3.0.0
WC Database Prefix: hp_data
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: ?

### Security ###

Secure connection (HTTPS): ?Your store is not using HTTPS. Learn more about HTTPS and SSL Certificates.
Hide errors from visitors: ?

### Active Plugins (29) ###

Advanced Custom Fields PRO: by Elliot Condon – 5.5.11
All-in-One Event Calendar Extended Views by Time.ly: by Time.ly Network Inc. – 1.2.11
All-in-One Event Calendar by Time.ly: by Time.ly Network Inc. – 2.5.18
BackWPup: by Inpsyde GmbH – 3.3.7
Black Studio TinyMCE Widget: by Black Studio – 2.3.1
Disable Comments: by Samir Shah – 1.6
Formidable Forms: by Strategy11 – 2.03.04
Google Analytics for WordPress by MonsterInsights: by MonsterInsights – 6.1.6
Jetpack by WordPress.com: by Automattic – 4.7.1
Custom Login Page Customizer: by Hardeep Asrani – 1.1.0
MainWP Child Reports: by MainWP – 1.5
MainWP Child: by MainWP – 3.3
Personalized WooCommerce Store: by Najeeb Ahmad – 1.2
Standard Stuff (SternData): by Stern Data Solutions – 2015.09.29
Search Autocomplete: by Gabe Shackle – 2.1.16
Show Current Template: by JOTAKI Taisuke – 0.3.0
WC Fields Factory: by Saravana Kumar K – 1.3.8
Widget Context: by Kaspars Dambis – 1.0.4
WooCommerce Colors: by WooThemes – 1.0.6
WooCommerce Customizer: by SkyVerge – 2.4.0
WooCommerce Grid / List toggle: by jameskoster – 1.1.0
WOOF - WooCommerce Products Filter: by realmag777 – 2.1.6
WooCommerce: by Automattic – 3.0.0
Wordfence Security: by Wordfence – 6.3.5
WordPress Importer: by wordpressdotorg – 0.6.3
WP All Import Pro: by Soflyy – 4.4.3
WP-Optimize: by David Anderson
Ruhani Rabin
Team Updraft – 2.1.1

WP All Import - ACF Add-On: by Soflyy – 3.1.3
WP All Import - WooCommerce Add-On Pro: by Soflyy – 2.3.5

### 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)
wcpb (wcpb)

### WC Pages ###

Shop base: #11936 - /classes/
Cart: #5688 - /cart/
Checkout: #5689 - /checkout/
My account: #5690 - /my-account/

### Theme ###

Name: The Art Center Highland Park
Version: 1.4.0
Author URL: https://whatagreatwebsite.net
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: tachp/woocommerce/archive-product.php
tachp/woocommerce/single-product.php version - is out of date. The core version is 1.6.4
tachp/woocommerce/taxonomy-product_cat.php

Outdated Templates: ?Learn how to update