Comment 1 for bug 1964147

Update: I just did a test run under Ubuntu 20.04, and had the same problem:

ID: com.canonical.certification::udev-summary_attachment
Category: com.canonical.plainbox::info
(Command output hidden)
Outcome: job failed
file:///home/ubuntu/.local/share/checkbox-ng/submission_2022-03-08T17.24.16.054669.html
file:///home/ubuntu/.local/share/checkbox-ng/submission_2022-03-08T17.24.16.054669.junit.xml
WARNING:root:Transport skipped due to exporter error (/home/ubuntu/.local/share/checkbox-ng/submission_2022-03-08T17.24.16.054669.tar.xz)
WARNING:checkbox-ng.launcher.stages:Problem occured when preparing com.canonical.plainbox::tar report:['Expecting property name enclosed in double quotes: line 4764 column 19 (char 1962626)']
file:///home/ubuntu/.local/share/checkbox-ng/submission_2022-03-08T17.24.16.054669.junit.xml
Do you want to submit 'upload to certification' report?
  y => yes
  n => no
[yn]: y
Enter submission description (press Enter to skip): Submission test
Enter secure-id:mCaEzxMrRx2TCcWYqTv3xX
WARNING:root:Transport skipped due to exporter error (https://certification.canonical.com/api/v1/submission/mCaEzxMrRx2TCcWYqTv3xX/)
WARNING:checkbox-ng.launcher.stages:Problem occured when preparing com.canonical.plainbox::tar report:['Expecting property name enclosed in double quotes: line 4765 column 19 (char 1962664)']
file:///home/ubuntu/.local/share/checkbox-ng/submission_2022-03-08T17.24.16.054669.junit.xml