[Python] Having trouble connecting to Cisco router through SecureCRT with a python script

So I am trying to connect through SecureCRT to a Cisco router with the python code below. If I run the script in vscode the variable connection_string looks like this "/SSH2 /L username /PASSWORD password 192.168.202.144", so that looks just fine. But in crt I get a script error "Connection Failed" and it points to "crt.Session.ConnectInTab(connection_string)".

Thanks in advance

I am omitting the "modify" function just to scale down the post a bit.

import os
from dotenv import load_dotenv
from pathlib import Path

dotenv_path = Path(r'C:\Users\user\Desktop\PythonScripts\.env')
load_dotenv(dotenv_path=dotenv_path)
username = os.getenv('env_username')
password = os.getenv('env_password')


def main():
# Open list with IP addresses
with open(r"C:\Users\user\Desktop\PythonScripts\ipaddresses", "r") as f:

for host in f:

modified_host = modify(host)

connection_string = f"/SSH2 /L {username} /PASSWORD {password} {modified_host}"

print(f"Connection string: {connection_string}")

crt.Session.ConnectInTab(connection_string)


main()

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