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# Dinghy Slack Notifications not working - java.lang.NoSuchMethodError- void org.jsoup

### Issue <a href="#issue" id="issue"></a>

Customers may find that after upgrading to 2.27.x cannot get Slack Notifications even though it was working previously. This can occur, for example, after setting up [Slack notifications in Dinghy](https://docs.armory.io/armory-enterprise/armory-admin/dinghy-enable/#slack-notifications) Upon investigating Echo logs, customers may see the following error in Echo: `org.springframework.web.util.NestedServletException: Handler dispatch failed; nested exception is java.lang.NoSuchMethodError: 'void org.jsoup.select.NodeTraversor.(org.jsoup.select.NodeVisitor)'` with a further reference to: `Caused by: java.lang.NoSuchMethodError: 'void org.jsoup.select.NodeTraversor.(org.jsoup.select.NodeVisitor)'`

### Cause <a href="#cause" id="cause"></a>

The issue was caused by recent upgrades to the `jinjava` package in Spinnaker, which caused an issue with a dependency in jsoup.