When using OWLViz in Protege, solve the problem that the classes cannot be displayed when stacked together

I use the version of protege5.2 to
download graphviz2.38 and put it in my own directory disk, and then change the directory of owlviz


. I don’t know whether graphviz needs to be configured or not. Mine is already configured, see:
https: //blog.csdn.net/weixin_41104835/article/details/97135159
finally shows: