key doesn't exist

[coinminingmkt]

Dear support,

I selected staking program and then had issue below. Can you advise? thank you.

The staking program is already selected.
Selected staking program: quickstart_beta_expert_6

• Populating staking program variables in the .env file

• Populating Nevermined variables in the .env file

• No Nevermined subscription set.
  Key AGENT_REGISTRY_ADDRESS not removed from /Users/xxx/Documents/GitHub/trader-quickstart/scripts/../.trader_runner/.env - key doesn't exist.
  Key MECH_REQUEST_PRICE not removed from /Users/xxx/Documents/GitHub/trader-quickstart/scripts/../.trader_runner/.env - key doesn't exist.

Finished populating the .env file.
Checking balance of owner/operator's address (minimum required 0.0500 DAI):

• Address: 0x342ff626E102e62a9117F2bB13c3573bAE4Fxxxx
• Balance: 0.0500 DAI
  OK.

[Service owner] Minting your service on the Gnosis chain...
Skipping registration of contract valory/staking_token:0.1.0 since already registered.
Error: Cannot load private key for following possible reasons

• Wrong key format
• Wrong key length
• Trailing spaces or new line characters