Cannot select iframe inside of an iframe

[MakeFish-dev]

To reproduce:
outer_iframe = driver.select_iframe("#outer-iframe", wait=Wait.LONG)
inner_iframe = outer_iframe.select_iframe("iframe", wait=Wait.LONG)

I cannot select an iframe inside of an iframe. It gives the error below:
botasaurus_driver.exceptions.IframeNotFoundException: 9C0E4B0E77536D8A8161DEA46763A3B1

[FayzulSaimun]

You have to move to the first iframe first. Then you can select the first iframe.
Follow this: https://stackoverflow.com/questions/44834358/switch-to-an-iframe-through-selenium-and-python