Hi @baileyji,
I am to blame for these changes, we’ve seen some cases where the board hangs because the register map tries to read from a “write-only” register. In your case Vivado is exporting these registers with the “write-only” access type and therefore pynq 2.7 will not read them.
While we investigate a better way you can use the previous version of the registers.py file. Run this command in a Jupyter Lab terminal, and then restart any Jupyer Notebook you may have
wget https://raw.githubusercontent.com/Xilinx/PYNQ/image_v2.6.0/pynq/registers.py -O /usr/local/share/pynq-venv/lib/python3.8/site-packages/pynq/registers.py
After this you should be able to see the register_map as before.
Mario