Crystal report viewer was working fine before upgrading .Net version to 4.5 . When I updated the version, I got surprised with a blank page, there was nothing at the place of Report Viewer rather then a blank page. I tried to investigate using the Inspect Element developer tool but there was not too much information that could help me.
I googled , but all the answers were outdated.
- what was the error
The problem was that I was missing the viewer engine files. I copied all files from
to root of the project
No need to make any changes into the config file. If you have added businessobject tag into the web.config then please remove it.
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