Developers MUST use
.* to denote a wildcard subscription. Implicitly, a
* at the end of channel names will NOT get translated to
.* and will result in a subscribe error. Here is an example of a proper wildcard subscribe which results in subscribing to all channels of that are prefixed with 'stocks.', like 'stocks.tech.', 'stocks.tech.aapl', 'stocks.healthcare.', etc.
For more details on proper code syntax, consult the official docs for the SDK you are using.