cgi bin - Using heron library, proxy.cgi is responding incorrectly, activated via python on windows

When I try to get feature info for layer “derine500” the request is all good
http://192.168.0.173:8000/cgi-bin/proxy.cgi?url=http%3A%2F%2F192.168.0.173%3A8080%2Fgeoserver%2Fwms%3FLAYERS%3DProjekti%253Aderine500%26QUERY_LAYERS%3DProjekti%253Aderine500%26STYLES%3D%26SERVICE%3DWMS%26VERSION%3D1.1.1%26REQUEST%3DGetFeatureInfo%26BBOX%3D7468281%252C4723226%252C7526857%252C4759738%26FEATURE_COUNT%3D8%26HEIGHT%3D652%26WIDTH%3D1046%26FORMAT%3Dimage%252Fpng%26INFO_FORMAT%3Dapplication%252Fvnd.ogc.gml%26SRS%3DEPSG%253A7392%26X%3D609%26Y%3D213

url: http://192.168.0.173:8080/geoserver/wms?LAYERS=Projekti%3Aderine500&QUERY_LAYERS=Projekti%3Aderine500&STYLES=&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetFeatureInfo&BBOX=7468281%2C4723226%2C7526857%2C4759738&FEATURE_COUNT=8&HEIGHT=652&WIDTH=1046&FORMAT=image%2Fpng&INFO_FORMAT=application%2Fvnd.ogc.gml&SRS=EPSG%3A7392&X=609&Y=213

but when I try to check the response it shows that proxy.cgi was not executed it gives me this
proxy.cgi is executed by

startheron.py which contains

import os
import http.server
import socketserver
PORT = 8000
handler = http.server.CGIHTTPRequestHandler
handler.cgi_directories = ["/cgi-bin/"]
os.chdir(os.path.dirname(os.path.abspath(__file__)))
handler.dont_inherit = True
with socketserver.TCPServer(("192.168.0.173", PORT), handler) as httpd:
print("Serving on port", PORT)
print("Open your web browser and navigate to http://192.168.0.173:8000")
try:
httpd.serve_forever()
except KeyboardInterrupt:
print("\nServer interrupted. Exiting...")