Problem importing a layout (Xibo 1.8.0)

Does anyone else having an issue when importing a layout into the CMS?
I have a layout that I exported from Xibo 1.7.4 that is 324MB in size. When I import it into Xibo 1.8 it seems to upload just fine but then displays an error “Not Found”. Smaller layouts under 100MB work just fine.
Also, my file size limit is set to 512MB in my php.ini file so I don’t think that is the problem.

Are you using IIS by any chance?

If you do, then please have a look here please under ‘Notes for IIS users’ How do I upload files bigger than 2MB / How can I increase the upload file size limit?

or directly here

Yes, IIS. It was the “Maximum allowed content length” that was limiting the uploads.
I really wish the PHP Manager for IIS would set that to match the max filesize setting in php.ini file.
Thanks for the help Peter.