Amigo, I had exaclty the same issue. Apparently the PC I was trying to connect from had bad system time. Once I synchronized with server it started working. If time is not correct you get the: TRANSACTION_EXPIRED error. Really weird but this is how it works. https://github.com/hashgraph/hedera-sdk-js/issues/212
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I'll have to look at the deletion thing again, I'm using the infrablocks JS SDK to interact with it mainly, and I can delete a pipeline it says, but when I attempt to re-create a pipeline (same vars/config) I initially get a fail cause it says a pipeline with that config exists but is archived.
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