error: TypeError: Cannot read properties of undefined (reading 'length')

[chrismogab]

[TradMod]

Share your Deploy.js
And make sure you are using await at the right places.....

[TradMod]

All looks good 🤔

Try

if (chainId == 31337)) { log("Local network detected! Deploying mocks...")

Instead of

if (developmentChains.includes(network.name)) { log("Local network detected! Deploying mocks...")

Because you are deploying on a local network that will be a same thing but more specific.
And also don't forget to get chainId before that,
const chainId = network.config.chainId

Try that and lemme know buddy..... Jope that works

[TradMod]

Hey Hey Hey!
Before that make sure to check this stackoverflow post, its patrick's solution

https://stackoverflow.com/questions/72462523/typeerror-cannot-read-property-length-of-undefined-while-deploying-using-ha

[TradMod]

Did it work bro?

[chrismogab]

I forgot to mark it as an answer yest it did thank you man !!

[kihiuFrank]

In my case, I had failed to include await in my getNamedAccounts()
Thanks @DevABDee. The answer was helpful!