Kakakuona Forum

Error Message: AttributeError: 'Headers' object has no attribute '_encodeName'

Workaround: Replace this code: [ Mine was from here: synapse-3.8/env/lib/python3.8/site-packages/synapse/http/proxy.py line 72 ]

if hasattr(Headers, "_canonicalNameCaps"):                                      
    # Twisted < 24.7.0rc1                                                       
    _canonicalHeaderName = Headers()._canonicalNameCaps  # type: ignore[attr-defined]                                                                           
else:                                                                           
    # Twisted >= 24.7.0rc1                                                      
    # But note that `_encodeName` still exists on prior versions,               
    # it just encodes differently                                               
    _canonicalHeaderName = Headers()._encodeName 

With this:

def _canonicalHeaderName(name):                                                 
    if isinstance(name, unicode):                                               
        return name.lower().encode('iso-8859-1')                                
    return name.lower() 

Error: (blocked:mixed-content)

Solution on Nginx:

Edit your Config file on Webserver

add_header 'Content-Security-Policy' 'upgrade-insecure-requests';  

save File, Exit and then Restart Nginx

$ sudo systemctl restart nginx 

Nice Resource

Great post

Change setting of the CPU type to “host” on your VM settings. That should expose all the instructions.