ROS1 roslaunch not working

[parthdoshi1]

Description
I have cloned the ros1 repository of rosbridge suite and am trying to run the rosbridge_server. The nodes and python file were made executables with cmd. The command
rosrun rosbridge_server rosbridge_websocket.py
runs without any issue. Also,
rosrun rosapi rosapi_node
runs withot any issue. However, when i start both the nodes with default launch file with following cmd
roslaunch rosbridge_server rosbridge_websocket.launch
the launch process exits with following error

RLException: Unable to launch [rosbridge_websocket-1]. If it is a script, you may be missing a '#!' declaration at the top.

• ROS Version: ROS1

Steps To Reproduce

• Download the zip file of the ROS1 branch
• compile the rosbridge_suite in ws.
• execute roslaunch rosbridge_server rosbridge_websocket.launch