Asynchronous request-level failure.
t/0 is used when an operation is rejected by API contract, session role,
relay availability, or protocol-level request semantics.
Summary
Types
@type op() ::
:connect
| :publish
| :create_track
| :write_frame
| :finish_track
| :subscribe
| :fetch
| :open_subgroup
| :write_object
| :write_datagram
| :close_subgroup
| :flush_subgroup