17.07.2026
23:51
Hi,
When I try to upgrade to the latest version 2026 (2026.2.2.106), an installer error occurs: Method not found: 'System.String Newtonsoft.Json.Linq.JToken.ToString(Newtonsoft.Json.Formatting)'.
Details are in the attachment. I am upgrading from version 2026.1.6.213.
Environment details:
Windows Server 2025 Standard
SQL Server 2025
The application pool account and the service account are local accounts
EDIT: The issue has been resolved. The error was caused by external files in the GAC. After removing the files, everything is working correctly.
