Error started when i updated to latest version of VScode 1.106.0, received the following in xdebug log:

Listening on { address: '::', family: 'IPv6', port: 9004 } Registering MYDEBUG on port 9004 with proxy @ me.REDACTED.com:9002 <- launchResponse Response { seq: 0, type: 'response', request_seq: 2, command: 'launch', success: false, message: 'Proxy read error processing instruction at position 4 is an xml declaration which is only at the start of the document', body: { error: { id: 0, format: 'Proxy read error processing instruction at position 4 is an xml declaration which is only at the start of the document', showUser: true } } }

At this point i updated dbgpProxy to the latest version, still same errors.

Heres launch.json
{ // Use IntelliSense to learn about possible attributes. // Hover to view descriptions of existing attributes. // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387 "version": "0.2.0", "configurations": [ { "name": "ME", "type": "php", "request": "launch", "port": 9004, /* DBGp Proxy configuration: */ "proxy": { "enable": true, "host": "me.REDACTED.com", "port": 9002, "key": "MYDEBUG" }, "pathMappings": { "/web/hosts/me.REDACTED.com": "${workspaceFolder}" }, "xdebugSettings": { "max_children": 200, // max number of array or object children to initially retrieve. "max_depth": 7, // maximum depth that the debugger engine may return when sending arrays, hashs or object structures to the IDE. "max_data": 4096 // max length of a string value of an inspected variable. The default value is 1024. So some values can be clipped. }, "log": true } ] }

Heres log output from dbgProxy via command "dbgpProxy -f -i 0.0.0.0:9002 -s 0.0.0.0:9001"
note, i redacted my ip from these logs as 1.1.1.1
Xdebug DBGp proxy (0.6.1) Copyright %s by Derick Rethans 2024 2025-11-18 15:26:23.221 [info] [dbgpProxy] Proxy started 2025-11-18 15:26:23.223 [info] [server] Started server server on 0.0.0.0:9001 2025-11-18 15:26:23.223 [info] [server] Started client server on 0.0.0.0:9002 2025-11-18 15:26:27.468 [info] [server] Start new client connection from 1.1.1.1:50216 2025-11-18 15:26:27.976 [info] [proxyinit] [MYDEBUG] Added connection for IDE Key 'MYDEBUG': 1.1.1.1:9004 2025-11-18 15:26:27.976 [info] [server] Closing client connection from 1.1.1.1:50216

1.38.0 vscode-php-debug plugin version