I am currently testing the OMP for our publishing house, but I have been having some problems. The Dashboard works correctly, but when I add a monograph to the catalog the web page does not work, it says it is not available.
The second screenshot suggests there might be something happening on your server: are you able to access your PHP error logs? Also, what specific version of OMP are you using (e.g. 3.4.0-3) - please include this info in your posts as it is helpful for troubleshooting.