Can't use mmio with my IP

Add a IP AFinterface in base.bit。
I try to use mmio for my IP,cause I can’t find the IP when I type ‘base?’ in jupyter notebook.
However,when I try to write regester my jupyter notebook will shutdown,

I don’t know how to fix this problem.
maybe address 0x44A40000 can’t be used or someother reason.

Maybe attaching your block design?

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