I publish several HTML reports after a build and after sorting out the Content Security Policy updates, one error remains.

Checksum mismatch

The checksum of the current wrapper file (5ea0d2ed1f4d0710e3ceaa8d2c3d9b35a3a13475) does not match the recorded checksum (6db1021567d9b39bdcd2b32a86e1dad589f620dd). This indicates a possible security issue, therefore Jenkins will not serve this file. You can access the archived HTML files here.

I don't know what this means or how to address it and I can't find any information in the HTML publisher plugin docs. Each report is configured like this one:

The problem only occurs when I click on the project-level report link, for example:

https://example.com/job/ExampleProject/Tests/

If I click the build-specific report, it displays fine, for example:

https://example.com/job/ExampleProject/101/Tests/

The same problem goes unanswered on Stack Overflow: http://stackoverflow.com/questions/34419223/jenkins-html-publisher-plugin-checksum-mismatch