Troubleshooting

How to Fix a 500 Error When Opening the Upsell App?

Why am I receiving a 500 error when attempting to access the Bold Product Upsell app?

You may be experiencing a 500 error due to browser cache and cookies. Try clearing your browser cache and cookies and ensure third-party cookies are enabled. For step-by-step instrcutions, please visit App Access Troubleshooting. 

Updated May 7 2026
Why is the Cart Drawer Widget Trigger Greyed Out?
I can't add Upsell to my checkout page

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I can't add Upsell to my checkout page My Upsell Offer Is Not Working Activate Bold Upsell

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Bold Upsell Overview
Bold Upsell Pricing & Overview
Maximizers™ Overview
[Video] Bold Upsell Video Library

Getting Started
Set up Bold Upsell
Activate Bold Upsell
Installation Guide for Bold Upsell

Offers
Upsell Offers Overview
More Ways to Upsell
Create an Upsell Offer
Create a Cross-sell Offer
Smart Offers
Create a Cart Drawer Offer
Create an In-Checkout Offer
Subscription Upsells
Customer Portal Upsells
Subscription Email Upsells
Create a Post Purchase Offer
Post Purchase Email Upsells
Upsell Funnels

Reporting & Statistics
Upsell Analytics: Dashboard & Reports
Activate Conversion Tracking on Shopify Plus

Frequently Asked Questions (FAQs)
General FAQs
Can I Create Discounts for My Offer Products Within Upsell?
Can I Use an Individual Variant in My Offer?
Can I Use Hidden Products in My Offer?
Can I Use Shopify Gift Cards in an Offer?
What Happens if a Customer Triggers More Than One Offer?
How Can I Understand Upsell's App Fees on My Shopify Bill?
Does Upsell recalculate shipping or create new orders for post-purchase upsell offers?

Troubleshooting
Post purchase offers are not appearing after checkout
How do I remove residual code and export my data after uninstalling Upsell?
App Access Troubleshooting
My Upsell Offer Is Not Working
My Offers Are Not Showing Any Conversions in Bold Upsell
I Can’t Find My Product in the Product Selector
Text Is Missing From the Upsell Window
The “No Thanks” Button Isn’t Showing in the Upsell Window
In-Checkout Widget is Missing From my List of Triggers
I Want to Hide the +1 Variant (From Quantity Breaks) in the Upsell Window

Customizations & Styling
Customize Upsell with the Theme App Extension
Bold Upsell Settings
Custom Upsell Template Styles
Bold Upsell CSS Styling Guide
Customizations in Bold Upsell

Integrations
Upsell: Bold App Integrations
Upsell & Bold Discounts Integration
Upsell & Bold Subscriptions Integration
Video Greet & Upsell Integration

Customers also asked...
Getting Started
Where is Upsell displayed on a store?
Does Bold Upsell integrate with all payment gateways?
Why does my Bold Upsell popup only trigger once?
Can Bold Upsell be tested on an unpublished theme before going live?
How many products can I add to an Upsell offer? Is there a limit?
Can I preview an offer within Bold Upsell?
Billing & Views
Are Maximizers™ included in my plan?
Why is my plan getting bumped up?
Can you Clarify the Billing?
What are Views?
How do I cancel my Upsell subscription?
How can I see my price plan details?
How come I can't create Manual Offers?
Smart Offers
How long does it take Bold Smart Offers to gather data?
How to Display AI Upsell Products on Collection Pages?
Discounted Offers
How can I create a buy one get one offer?
How to Discount an Upsell Product in Bold Upsell
How to Configure Bold Upsell to Remove Discounts When Required Products are Removed?
How can I offer a discounted product?
Post Purchase Offers
Can I show two offers or more in a Post Purchase offer?
How to Change the Language of Bold Upsell Post-Purchase Offers?
General
Can I embed cross-sell offers directly on product pages without using pop-ups?
Can I Use Multiple Collections as Triggers or Offers in Bold Upsell?
How to Force Customers to Buy a Product Using Bold Upsell?
How to Exclude Subscription Products from Upsell Offers?
Can Bold Upsell sort cross-sells by best-selling items?
How to Prioritize Multiple Manual Upsell Offers in Bold Upsell?
How to View Specific Converted Orders in Bold Upsell?
Can Bold Upsell Add Product Recommendations to the Cart Drawer?
Can Bold Upsell automatically add a product to the cart based on spend?
Can Bold Upsell offer products to specific customer segments only?
Can Bold Upsell create an in-cart upsell offer outside of a drawer cart?
Can I offer a more expensive variant of the same product to replace the product in cart?
Customizations & Styling
How to Change the Language in the Upsell Pop-ups?
How to Customize Bold Upsell Pop-Up Design
How do I customize the Bold Upsell app widget style?
Can Bold Upsell integrate with third-party subscription apps?
How Can I Translate Bold Upsell?
Can Bold Upsell Display Surveys?
Troubleshooting
Why is the Cart Drawer Widget Trigger Greyed Out?
How to Fix a 500 Error When Opening the Upsell App?
I can't add Upsell to my checkout page
Why isn't my Bold Upsell popup showing on my homepage?
Bold Homepage
Developer Docs
Status Page