Error when running testchain

[dharmendrakariya]

I am trying to run testchain using https://github.com/makerdao/testchain and then created testChain.js same as startKovan.js and startMainnet.js in /src folder

Also I added the script in package.json

After that I run testchain and keepr using yarn run testchain but it throws below error

(⎈|do-lon1-k8s-quantum:default)➜  auction-demo-keeper git:(main) ✗ docker run -it --rm  dharmendrakariya/keeper:v5 yarn run testchain                                             
yarn run v1.22.19
$ node --experimental-json-modules src/testChain.js
(node:29) ExperimentalWarning: Importing JSON modules is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)

Initializing Keeper

Initializing  Wallet {
  _isSigner: true,
  _signingKey: [Function (anonymous)],
  address: '0x9F51661667f25f472eCF5198aC5526e7C144f55d',
  _mnemonic: [Function (anonymous)],
  provider: null
}
(node:29) UnhandledPromiseRejectionWarning: Error: invalid contract address or ENS name (argument="addressOrName", value=undefined, code=INVALID_ARGUMENT, version=contracts/5.6.2)
    at Logger.makeError (/usr/src/app/node_modules/@ethersproject/logger/lib/index.js:233:21)
    at Logger.throwError (/usr/src/app/node_modules/@ethersproject/logger/lib/index.js:242:20)
    at Logger.throwArgumentError (/usr/src/app/node_modules/@ethersproject/logger/lib/index.js:245:21)
    at Contract.BaseContract (/usr/src/app/node_modules/@ethersproject/contracts/lib/index.js:669:20)
    at new Contract (/usr/src/app/node_modules/@ethersproject/contracts/lib/index.js:1053:42)
    at clipperAllowance (file:///usr/src/app/src/vat.js:8:25)
    at keeper.run (file:///usr/src/app/src/keeper.js:384:17)
(node:29) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:29) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
Done in 0.34s.

Could you help me with this? basically I want to test the keeper befor going with the mainnet deployment!