I'm writing some code to simulate a quantum computer in python. I just added a section which starts integrating greater-than-one-qubit functionality, and then this weird error came up. It doesn't say anything about which line caused it, so I don't really even know where to start fixing it, and I've never seen it before. Further, the program keeps running and outputs the correct answer in the few testcases I've run, even with this error. I'm writing some code to simulate a quantum com