Webdav Launcher Fails to Install in Firefox Due to 'Not a valid install package -207'
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
Summary
When attempting to use the Edit in Word feature of the Office Connector in Firefox, an error appears.
Diagnosis
When attempting to use the Edit in Word feature of the Office Connector in FireFox, the following error appears:
FireFox could not install the file at
http://<your confluence url>/download.resources/com.atlassian.confluence.extra.officeconnector:viewfile/webdavloader.xpi
Not a valid install package -207Cause
A custom theme or decorator is responsible for the installation failure. There is a bug report for this in CONF-16936.
Solution
Switch to the Default Theme and try the installation again, from Browse >> Space Admin >> Themes. You must be a space administrator to access this page.
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