Transaction revert error

[aseok]

Describe the bug
Hi
Trying the dodo flashloan example, this is the error:
Uncaught Error: Transaction reverted: function call to a non-contract account
and addressing multiple files e.g. DODOFlashloan.dodoFlashLoan (contracts/dodo/DODOFlashloan.sol:36).

To Reproduce
Steps to reproduce the behavior:
per instructions.

[aseok]

solved.
must use polygon mainnet.