The specified CGI application misbehaved by not returning a complete set of HTTP headers.

Permalink
I'm trying to install concrete5.6.2.1 on my shared hosting account. I start the install, it appears to be going ok, creating tables etc then I get the message

CGI Error
The specified CGI application misbehaved by not returning a complete set of HTTP headers.

I can see it has created 14 tables in the database.

Any suggestions?

Andy