Issue Summary

Unable to clear build error logs from Bamboo UI using the "Clear All errors from log" button and also individual errors.  Here are the two issues identified 

• Issue 1:  "Page Not Found" error when  clicking on the "Clear All errors logs" button from the build plan error logs screen.
• Issue 2:  When clearing the individual errors one by one the errors get deleted, however they reappear when they refresh the page.

This is reproducible on Bamboo 11.0.1 and 11.0.3 Data Center:

• From the Bamboo logs (atlassian-bamboo.log) we see the following errors

  2025-07-14 22:02:49,599 ERROR [http-nio-8085-exec-14 url: /bamboo/chain/removePlanErrorsFromLog.action; user: admin] [BambooStrutsUnknownHandler] There is no Action mapped for namespace [/chain] and action name [removePlanErrorsFromLog] associated with context path [/bamboo].

• Seems like the action mapping for the action 'removePlanErrorsFromLog' has been removed from the context causing 404 error or Page not found error.
• The issue does NOT occur in Bamboo 10.2.6

Steps to Reproduce

1. Create a build plan and configure a task which should fail when the build is ran.
   e.g. create a 'Source Check out' task with invalid repository, etc..
2. After saving the build plan, run the build plan, which should result in failure and produce error logs. You can try running the build multiple times to produce more error logs.
3. Try clicking on "Clear All errors logs" button and this will redirect to a new page with "Page not found" error as captured in the screenshot attached.
4. Also, when you try to delete the individual error (by clicking on the 'X' mark on the message), it will get deleted but it come back when the page is refreshed. 

Expected Results

The "Clear All errors logs" button should be able to delete all the logs and should not show "Page not found" error. Also when the individual errors are deleted they should not come back when the page is refreshed.

Environment

Bamboo 11.0.1, 11.0.2 and 11.0.3 Data Center

Workaround

• Issue 1: To Clear All errors
  From Bamboo UI, login as admin user with sudo session, navigate to Setting (Cog wheel) -> Overview -> System -> System Error - Click on "Clear All error log" button 
• Issue 2: To clear individual errors 
  Login as admin user with sudo session, navigate to Build plan -> Error log
  and delete each of the individual errors by clicking on the 'X' mark on the corresponding error.