SumUp payment window fails to open at checkout
The SumUp payment window does not open at checkout after plugin or WooCommerce updates.
Tier I · Proven The best-established problems.
8 public reports · first reported 5 December 2023 · last reported 26 June 2026
What's going wrong
After updates to the SumUp plugin or WooCommerce, customers placing orders see no payment window. Instead they get a generic processing error, or the order is created as pending or cancelled with no card form. Some owners rolled back to older plugin versions to keep taking payments. Reports tie the failures to specific WooCommerce releases and to JavaScript functions the plugin no longer exposes. Shop owners on block or classic checkout are affected, and some lose sales or see orders marked wrongly. A compatibility monitor that tests checkout on each new release would catch these breaks early.
AI-assisted: written with the help of AI from the reports.
Products affected
SumUp Payment Gateway For WooCommerce.
Related problems
Who has this problem
2 businesses found.
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