AssertionError Minizinc for Python - minizinc

Question

I got this error when trying out the sample code (https://minizinc-python.readthedocs.io/en/latest/getting_started.html) of the minizinc web.
from minizinc import Instance, Model, Solver
# Load n-Queens model from file
nqueens = Model("./nqueens.mzn")
# Find the MiniZinc solver configuration for Gecode
gecode = Solver.lookup("gecode")
# Create an Instance of the n-Queens model for Gecode
instance = Instance(gecode, nqueens)
# Assign 4 to n
instance["n"] = 4
result = instance.solve()
# Output the array q
print(result["q"])
The error I got was:
AssertionError Traceback (most recent call last)
<ipython-input-1-a64f1a5182f8> in <module>
2
3 # Load n-Queens model from file
----> 4 nqueens = Model("./nqueens.mzn")
5 # Find the MiniZinc solver configuration for Gecode
6 gecode = Solver.lookup("gecode")
C:\ProgramData\Anaconda3\lib\site-packages\minizinc\model.py in __init__(self, files)
85 self._lock = threading.Lock()
86 if isinstance(files, Path) or isinstance(files, str):
---> 87 self.add_file(files)
88 elif files is not None:
89 for file in files:
C:\ProgramData\Anaconda3\lib\site-packages\minizinc\model.py in add_file(self, file, parse_data)
159 if not isinstance(file, Path):
160 file = Path(file)
--> 161 assert file.exists()
162 if not parse_data:
163 with self._lock:
AssertionError:
I've downloaded both minizinc and python. I tried using jupyternotebook and spyder, but they both had the same issue.
If anyone has faced the same issue and fixed the problem I'll appreciate any feedback regarding this problem.