.exceptions.UnhandledRPCError: Execution error: missing required active authority: Missing Active Authority

Good afternoon! I am developing operations for my version of the blockchain based on Bitshares-Core. I decided to switch to a new version of Python-Bitshares. After calling the "create_asset" method (or trying to send the "Asset_create" operation), an execution error "Execution error: missing required active authority: Missing Active Authority" constantly occurs. I imported the keys into my wallet. For example, the "transfer" operation works correctly. The operations are successfully performed via the cli_wallet API (I send requests via NodeRPC), but there are problems with the witness API.. What could be the problem?