Transfer tips: Cannot verify transaction

[skycoo]

bitcoinlib==0.6.15

w = wallet_create_or_open('cf03', keys=wif, witness_type='segwit', network='testnet', db_uri=db_uri)
w.utxos_update()
w.info()

to = w.send_to('tb1q7cargxh8f3qntvhfk3dnqt623g8v5qdz3jve89', 1000, offline=False)
to.info()

>>> log

=== WALLET ===
 ID                             4
 Name                           cf03
 Owner                          
 Scheme                         bip32
 Multisig                       False
 Witness type                   segwit
 Main network                   testnet
 Latest update                  None

= Wallet Master Key =
 ID                             24
 Private                        False
 Depth                          0

- NETWORK: testnet -
- - Keys
   29 m/84'/1'/0'/0/0              tb1q63qgz8cu6f7m0p96q0lacdaz0acy8sj63q9jv6    address index 0                     0.00001000 TBTC
   31 m/84'/1'/0'/1/0              tb1qdgwsy8dns2mqprharm8lktk7fp8cvrh8klfd2z    address index 0                     0.00038070 TBTC
   32 m/84'/1'/0'/0/1              tb1qu5zkg2yd36qw4gvl4y3yswxzjtc64u7t5wqx3y    address index 1                     0.00018169 TBTC
   33 m/84'/1'/0'/0/2              tb1qp79j255ykd9dss39799lv7pse40mzk4qkx2jp7    address index 2                     0.00000000 TBTC
   34 m/84'/1'/0'/0/3              tb1q2340cekdeg4junru4w794a95jgwqgc27tpm2x4    address index 3                     0.00000000 TBTC
   35 m/84'/1'/0'/0/4              tb1q903thwaxjd8q6t9sk50rvrzszhyv57djvsekma    address index 4                     0.00000000 TBTC
   36 m/84'/1'/0'/0/5              tb1qaqw9p247y2uh5hphy0gpmjhhlvt0ugwfgxhgm8    address index 5                     0.00000000 TBTC
   37 m/84'/1'/0'/1/1              tb1qhx3qrqfvkqdfwesxntr0qnt59n46jsx82yhgdm    address index 1                     0.00000000 TBTC
   38 m/84'/1'/0'/1/2              tb1q2jnzwn63x8jrv20x379mdrrsspl274cxxxq2tv    address index 2                     0.00000000 TBTC
   39 m/84'/1'/0'/1/3              tb1qw7ntz2vvsxlevn58rhr88yx3snafatc7xhl9vd    address index 3                     0.00000000 TBTC
   40 m/84'/1'/0'/1/4              tb1q27wxrsz4uf0k7lv8h7azxwpw48ad432j5n8a7a    address index 4                     0.00000000 TBTC
   41 m/84'/1'/0'/1/5              tb1qxcnevt9jt6j7d74uu59qa4yk8wrlj2ye4zgzuj    address index 5                     0.00000000 TBTC
   84 m/84'/1'/0'/0/6              tb1qxshe7euru7vkhcek5dsres58twn5rmj0tzxt4h    address index 6                     0.00000000 TBTC

- - Transactions Account 0 (4)
4290be39e73a48d52f449c3cfcb569b97d72c7e19e374a0d2bdff41070e54d1a  tb1qdgwsy8dns2mqprharm8lktk7fp8cvrh8klfd2z      109       0.00001000 TBTC U 
8f7452a458a5164697323c9caf8b6d525231e92f6c8ae7958a1632ccee548e1b  tb1q63qgz8cu6f7m0p96q0lacdaz0acy8sj63q9jv6      108       0.00001000 TBTC U 
a971a95b1389bd4807f66ee5f4bbed37fde8fde8399cdf341aa223a23bad00f5  tb1qdgwsy8dns2mqprharm8lktk7fp8cvrh8klfd2z       95       0.00037070 TBTC U 
94a0573059a3e5d509400571c565551816f736a3af8277b3470fea69ad384094  tb1qu5zkg2yd36qw4gvl4y3yswxzjtc64u7t5wqx3y       87       0.00018169 TBTC U 

= Balance Totals (includes unconfirmed) =
testnet              (Account 0)               0.00057239 TBTC

---------------------------------------------------------------------------------------------------------
Transaction 4b4a0a0fdf0bc96f5c9eda1895051b201d555b3fbf06d8067caf8bb46b94f935
Date: None
Network: testnet
Version: 1
Witness type: segwit
Status: new
Verified: False
Inputs
- tb1qu5zkg2yd36qw4gvl4y3yswxzjtc64u7t5wqx3y 0.00018169 tBTC 94a0573059a3e5d509400571c565551816f736a3af8277b3470fea69ad384094 0
  segwit sig_pubkey; sigs: 0 (1-of-1) not validated
Outputs
- tb1qhx3qrqfvkqdfwesxntr0qnt59n46jsx82yhgdm 0.00016887 tBTC p2wpkh U
- tb1q7cargxh8f3qntvhfk3dnqt623g8v5qdz3jve89 0.00001000 tBTC p2wpkh U
Size: 116
Vsize: 116
Fee: 282
Confirmations: None
Block: None
Pushed to network: False
Wallet: cf03
Errors: Cannot verify transaction

How to fix : Errors: Cannot verify transaction

[mccwdev]

The wallet info states it does not contain any private key, so it can not sign and verify transactions.
So you probably imported a public master key?