After an In-Place upgrade of Active Roles, the following errors are observed in the Configuration Center after being prompted to upgrade the Web Interface sites configuration:
"Unable to retrieve Web Interface site configuration objects.
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: Index"
The sites function normally, but the Configuration Center repeatedly prompts for upgrades.
Clear the IsInPlaceUpgrade flag in the Registry.
Restart the Configuration Center to verify if the problem is resolved.
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