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Thank you for contacting Syncfusion support.
From the provided screenshot we suspect that the project version is lower than the referred assembly version. Kindly use the assemblies with version same as the project version or lower than the project version.
If your project framework is 4.0 then refer the assemblies from the folder you mentioned
C:\Program Files (x86)\Syncfusion\Essential Studio\220.127.116.11\Assemblies\4.0 (or lower version)
Please let us know if you have any questions.