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Article ID: KB0070849
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Updated On:
Description
After updating the web.config file in Statistica Data Entry or Statistica Server (typical location of C:\WebStatisticaPub\DataEntry or C:\WebStatisticaPub\wwwroot, respectively), one of the following error occurs:
Cause The default override setting is set to "Deny" in the applicationHost.config file (typical location is C:\Windows\System32\inetsrv\Config) so changes cannot be made by just replacing the web.config file alone. See below:
https://techcommunity.microsoft.com/t5/iis-support-blog/overridemodedefault-and-allowdefinition-attributes/ba-p/305415
Resolution
1. Open IIS Manager
2. Click the server name in the tree on the left side
3. In the middle pane, go to the Management section and double-click Configuration Editor:

4. At the top, choose the section system.webServer/security/authentication/anonymousAuthentication
5. In the right-hand pane, click Unlock Section
6. At the top, choose the section system.webServer/security/authentication/windowsAuthentication
7. In the right-hand pane, click Unlock Section

8. Follow the same steps, above, for the DataEntry, or WebStatistica, section as well, if necessary:

Issue/Introduction
When installing a new web.config, which has needed changes for data entry to function fully, the 500 Internal server error appears,e.g., Windows Login does not work.