# DataStore module: "The requested URL was not found on the server." error

**URL:** <https://discourse.slicer.org/t/datastore-module-the-requested-url-was-not-found-on-the-server-error/20338>\
**Category:** Support\
**Created:** [October 25, 2021, 1:05pm UTC](https://discourse.slicer.org/t/datastore-module-the-requested-url-was-not-found-on-the-server-error/20338 "2021-10-25T13:05:04Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [October 25, 2021, 1:26pm UTC](https://discourse.slicer.org/t/datastore-module-the-requested-url-was-not-found-on-the-server-error/20338/3 "2021-10-25T13:26:11Z")

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The servers were upgraded so the midas version doesn’t exist anymore. See this post about extensions and DataStore items.

> [@Downloading extensions for older releases](https://discourse.slicer.org/t/downloading-extensions-for-older-releases/19256):
>
> Due to the recent transition to the updated Extension Manager and Data Store infrastructure, when using Slicer-4.11 (or older) version, users will need to manually download and install extensions from the new extension server, and download data sets from an alternative server instead of using the Data Store module. Rationale for the transition can be found [here](https://discourse.slicer.org/t/upcoming-downtime-for-download-slicer-org-and-extension-manager-due-to-package-server-transition/17444). We anticipate that this will be a temporary measure will the transition is finalized. Thank you for your patience! Please do not hes…

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