Tutorial 6 off-chain storage doesn't work

[qwadratic]

Tutorial 6:

• The code for the tutorial comes with a different project structure which the tutorial does not refer to. Also in the 06-offchain-storage folder, there is ui/pages directory which seems to be added by mistake
• The contracts/src directory has SignedMessageBoard which is not covered in the tutorial. Anyway, I am not able to run it (see the error message below) and unfortunately, I can’t find a way to fix it.

/Users/ii/mina/docs2/examples/zkapps/06-offchain-storage/offchain-storage-zkapp/contracts/node_modules/o1js/dist/node/bindings/compiled/_node_bindings/snarky_js_node.bc.cjs:7467
         throw err;
         ^

Error: "Assert_failure src/lib/transaction_logic/zkapp_command_logic.ml:1286:17"
    at Object.sendTransaction (o1js/dist/node/lib/mina.js:249:24)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async sendTransaction (o1js/dist/node/lib/mina.js:745:12)
    at async Object.send (o1js/dist/node/lib/mina.js:176:24)
    at async main (file:///Users/ii/mina/docs2/examples/zkapps/06-offchain-storage/offchain-storage-zkapp/contracts/build/src/messageBoardMain.js:29:5)

• For some reason, the tutorial asks the user to deploy the app to Berkeley, however, in other tutorials, we are happy to have local deployment.
• The correct command to run the off-chain storage server should be node offchain-storage-zkapp/contracts/node_modules/experimental-offchain-zkapp-storage/build/src/server/storageServer.js
• For some reason when I do “zk deploy” I get the following error

Failed to send transactions to the relayer. Errors: Couldn't send zkApp command: (Verification_failed
 "Invalid_signature: [B62qmVz7pPiLXPvz2nPkuK3K5akjrePAVtdBVMfeyixrccgqKTQte8K]") 

however other contracts are deploying successfully with the same feePayer account.

• As a result, I am unable to run the tutorial