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Update the app version
Please make sure that you have the latest app version. Usually, we fix issues pretty quickly and there is a chance that your problem already has been fixed.
Please make sure Bamboo can reach Incoming Webhook URLs.
Enable the Debug mode
If you see some problems with the app we recommend checking the browser console for errors as well as enabling debug mode for the App's namespace to see any errors.
Go to Bamboo administration > System -> Log settings. Then add the app key for "Classpath" and choose DEBUG as "Type". You should then see log messages of the app with severity DEBUG either in your Bamboo Server log (BAMBOO_HOME/logs/atlassian-bamboo.log) or in the Remote Agent server log.
The additional guide from Atlassian.
Download the support zip
You can send us the support zip, which contains the log files. You can download it following this official Atlassian documentation.
You can create a support request with all the information you can gather; please include the screenshot of the configuration (please don't worry about the webhook URLs, we won't store or use them) and the logs or errors you could find in the browser or on the server-side.