Unsupported RPL stream version detected

Affected Software: SSRS on SQL Server 2008 R2

Issue: Wen a user was trying to run their reports from the SSRS website, they received an error; 

An error occurred during client rendering.
Unsupported RPL stream version detected: xx.xx.xxxxxxxxx. Expected version: xx.x.

A few blogs and sites indicated this could be a problem with a Sharepoint WebPart however as this particular server was setup in SSRS Native Mode, this was unlikely to be the issue.

Very quickly, the problem was identified as no disk space left on the drive where the SSRS was installed.  

Cleared some space on that drive and restarted the SQL SSRS Service for that server and reports were once again, working normally.