switchToIframe not working with nested iframes.

[Clint Fortinbrass]

Hi All,

I have two iframes nested within each other.
I find and switch to the first iframe.
From there
I can find but cannot switch to the second iframe i get
the following error message

Any help 
Greatly appreciated

invalid selector: An invalid or illegal selector was specified
(Session info: chrome=89.0.4389.90)
(Driver info: chromedriver=89.0.4389.23 (61b08ee2c50024bab004e48d2b1b083cdbdac579-refs/branch-heads/4389@{#294}),platform=Mac OS X 10.15.6 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 18 milliseconds