The Telerik.Reporting.Interfaces namespace is included with the Telerik.Reporting.dll
assembly. This error may be associated with the wrong version of the assembly reference. There are a couple of steps to fix this and these are as follows:
Step 1 -
Ensure the correct version is installed as described in the Telerik Reporting Version=188.8.131.52
Step 2 -
Change the reference to the correct version in Visual Studio as noted in the below screenshot.
Please give this a try and let me know if the issue still persists. Thank you.
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