After doing two text redaction the application throws an error

After doing two text redaction the application brokes with a modal error saying “Something went wrong, Server is not available” and in the server log we can see the following exception:

Log: log-text-redaction-annotation.7z (14.4 KB)
Git project: GitHub - groupdocs-annotation/GroupDocs.Annotation-for-Java: GroupDocs.Annotation for Java examples, plugins, and showcase
Git branch: master
Git revision: aeb3d5d9
Browser: Chrome Version 92.0.4515.159 (Official Build) (64-bit)
SO: Windows 10
Java version: 1.8.0_281

This topic has been moved to the related forum: Adding multiple text redaction annotations throws an error in Java - Free Support Forum - groupdocs.com