The generated attribute "QPLL_FBDIV_TOP" (QPLL_FBDIV_IN) is wrong.
However if you select "Start from scratch" and the same settings, the attribute is correct.
The incorrect value is 40, the correct value should be 80.
The problem cannot be seen in simulation.
Both 40 and 80 can work here.
However, GTH QPLL VCO should be larger than 8G.
As a result QPLL_FBDIV_IN=40 is wrong.
This will be fixed in the next version of the wizard.