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:- Integrating PDF.js Express Viewer into an existing Angular project - Setup
- Integrating PDF.js Express Viewer into an existing Blazor project - Integrate PDF.js Express Viewer
- Support forms with PDF.js Express
- UndefinedgetInstance( [element])
- Core.Tools.TextSquigglyCreateTool - contextMenu(e)
- Core.Annotations.RotationUtils - PathCustomAnnotationRotationMixin()
Share how you are using PDF.js Express in your organization you could win a $500 Amazon gift card. All participants will receive 6 months of PDF.js Express+ for free. Learn more here