As far as I know, ElementNotInteractableException is caused when an element is found, but you can not interact with it.There could be several reasons for this:
- The element is not visible / not displayed
- The element is off screen
- The element is behind another element or hidden
- Some other action needs to be performed by the user first to enable it.
So, please check whether the dropdown is hidden, and make it visible and available. More detail information about this error, you could check this thread:
org.openqa.selenium.ElementNotInteractableException
How do I resolve the ElementNotInteractableException in Selenium WebDriver?
Besides, here are some related article about how to Select Value from DropDown using Selenium Webdriver using Java, you could check it: link1 and link2