SSRS - Internal server 500 error

Question

I am getting Http 500 error while rendering reportviewer. the server responded with a status of 500 (Internal Server Error) See the error below

http://localhost:59214/Reserved.ReportViewerWebControl.axd?OpType=SessionKeepAlive&ControlID=837415b70bc74a908169e1274b125c25
Failed to load resource: the server responded with a status of 500
(Internal Server Error)

I tried adding the following:

1. Added handler in <webserver>ie.

      <add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="*" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=12.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" />

3. Page directive added ValidateRequest="false"
4. AsyncRender ="False" in reportviewer.

Please help still i am getting the 500 error. I am using Vs2017 with Microsoft Report 12.0

Update

See the Log file of SSRS server [Log File - click to see][1]

[1]: https://drive.google.com/file/d/1cU9TzLdDPFiLzUbmyYR0FA9_p8CV_Joz/view?usp=sharing. My report is /Development/pd_Report_SalesPricingGrid. Highlighted in the log bold and red.