Watermark still showing even with correct domain

[system]

Hello, I’m Ron, an automated tech support bot

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

Guides:

• Adding your license key - PDF.js Express Plus License Keys
• Add a watermark to a document using the Express REST API - Body params
• Development - With a license key

APIs:

• Core.Document - setWatermark(options)
• UI - getWatermarkModalOptions()
• Core.DocumentViewer - setWatermark(options)

Forums:

• Watermark still showing with license key
• Pdfjs.express watermark despite licence key & correct domain
• Generating a key for a .co.uk domain