I cannot see my model

Cloud Mason fa 9 anys updated by Michał Kołodziejski fa 9 anys 2
The graphical display of my model seems to have disappeared. I can click on the the tables and see all the columns and properties, but I cannot get the graph to display.
Under review
Does this problem still occur? The model doesn't seem to be corrupted or invalid.
No reply for 2 months, I mark the issue as "answered".