Twisted has a new version which causes failure #SYNAPSE

[darwin]

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()