DOCS: document loan error

[tranduybau]

Context:

When doing the course of loan link, I faced the issue after running every comment started with loand.
Here is the image of the issue:

Describe the Bug:

After copied all the demo code and started the chain, the blockchain was working, but after that every comment is denied:

loand tx loan request-loan 1000token 100token 1000foocoin 500 --from alice --chain-id loan
-> rpc error: code = Unknown desc = loan is not ready; please wait for first block: invalid height

Steps to Reproduce:

1. Copy all the code in the docs
2. Start blockchain
3. Got error when use loand xxx

Expected Behavior:

The code should work

Actual Behavior:

Error log:

loand tx loan request-loan 1000token 100token 1000foocoin 500 --from alice --chain-id loan
rpc error: code = Unknown desc = loan is not ready; please wait for first block: invalid height

Environment Details:

• OS: MacOS
• Ignite Version: v28.7.0
• Go Version: go1.23.5
• Other Relevant Tools: (e.g., node, npm, or other dependencies, if applicable)

Notes:

[julienrbrt]

Could you show me what happens if you run the chain passing the version flag?

ignite chain serve -v