I am not able to uncheck multiple checkbox of my application

Miscellaneous
6

The above error means for the method, waitForElementClickable, you either have the wrong number of parameters, or you have the wrong data type for the parameters. It should look like:

WebUI.waitForElementClickable(findTestObject(...), 10)

In your code below, you have a WebElement instead of a TestObject used in the method (wrong data type). Either look up a Selenium “wait” statement for your WebElement or you need to convert a WebElement to a TestObject (or at least use the pathway of the WebElement to create a new TestObject).

for (WebElement element : elements) {
    // 'element' needs to become a TestObject
    WebUI.waitForElementClickable(**element**, 10)

Edit: KS now has a method to do the conversion:

So, you could use the method like:
WebUI.waitForElementClickable(WebUI.convertWebElementToTestObject(element), 10)