'The project you are trying to view does not exist' Error Message Due to Project Key Pattern
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Symptoms
After upgrading JIRA, the following error is thrown while viewing issues in specific projects:
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ERROR
The project you are trying to view does not exist. Try browsing for projects.
If you think this message is wrong, please consult your administrators about getting the necessary permissions.
Cause
This error occurs due to a project key pattern previously configured in the previous JIRA version.
Resolution
Copy the previous values for the project key from the old version's %JIRA_HOME/atlassian-jira/WEB-INF/classes/jira-application.properties file. See Configuring Project Keys for specific instructions.
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