1)There is one red flag. I will try figuring out where it sees a problem and see what it is. However, it had been compiling in spite of the red warning for multiple builds.
Hover or left click on the block that has the red flag (I don't remember which command) and it will post a message that might help you. I suspect this is the issue.
One thing you can do is right click on the block and select Disable block temporarily and attempt to compile.
To find out file size, you need to build the aia. Yeah, bummer as you can't do that at the moment. Build the aia, download to your PC and view the size of the aia file.
Good luck. Let us know how it goes.