Welcome in the forum, Steve.
The report file ( .rpt) can be opened when you click on the "Results"-tab on the workspace explorer. But it might not help you to exactly specify the error.
The fixed function blocks you use have got dedicated pins in a PCoC4. Easiest might be to unlock all pins and build new. Port4 pins are not easy to use, so spare them. When still in trouble, post your complete project, so that we all can have a look at all of your settings. To do so, use
Creator->File->Create Workspace Bundle (minimal)
and attach the resulting file.
I was splitting the SPI port across two different channels. What I mean by this is apparently you can't use SCB1:spi_MOSI, SCB1:spi_MISO with SCB2:spi_CLK, SCB2:spi_SELECT.
You're suggestion to unlock the pins and re-compile showed me the issue. Thanks!
You are always welcome!