PermissionError: [Errno 13] Permission denied: '/sys/bus/pci/devices/0000:01:00.0/resource0'

I'm trying to access the ram in a PCIe fpga device using python and pypcie,This is my code:

from pypcie import Device#Defining the pci extended BDF connection id of the target deviced=Device("0000:01:00.0")#Set bar mapping valuebar = d.bar[2]#Write bar.write(0x0000, 0x00000001)

Rather simple and similar to the example they have given on their git page.
But when I run the code I encounter the Error

Traceback (most recent call last):  File "/home/lab/Desktop/PCIE_playground/pcie_bar_access.py", line 4, in <module>    d=Device("0000:01:00.0")      ^^^^^^^^^^^^^^^^^^^^^^  File "/home/lab/.local/lib/python3.12/site-packages/pypcie/device.py", line 23, in __init__    self.bar[barnum] = Bar(resfile)                       ^^^^^^^^^^^^  File "/home/lab/.local/lib/python3.12/site-packages/pypcie/bar.py", line 17, in __init__    fd = os.open(filename, os.O_RDWR)         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^PermissionError: [Errno 13] Permission denied: '/sys/bus/pci/devices/0000:01:00.0/resource0'

From this I assume its just a permission issue so I go into the console to try and give everyone permission to RW the file though I assumed I would have permission to do so since I am the only user on the PC, but when I run chmod 666 resource0 in the corresponding directory
it returns the following error instead:

chmod: changing permissions of 'resource0': Operation not permitted

I tried googling for ways to change the permission but nothing seems to work.

I am working on a Ubuntu 20.04.6 LTS