You'll notice
Useful2 Signal1
Rejected local socket paths now tell you exactly which rule they broke.
What's wrong with this entry?
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What
When a local connection target is rejected, the message now names the cases it rejects: remote or UNC hosts, and pipe names with extra segments or a trailing dot or space. The underlying error code is unchanged.
Evidence
Refusing to connect: not a usable local IPC path (remote/UNC host, or a pipe name with extra segments or a trailing dot/space):
Strings lifted out of the shipped bundle, so the claim above can be checked against them.