Unable to upload document, facing exceptions about fluentlenium HOT 2 CLOSED

I do something very similar in my tests i.e upload documents and it seems to work just fine, both with a local and remote driver/browser.
There aren't many details, in your question, to know exactly what might be going on. FWIW, this does not seem to be a Fluentlenium issue, for now.

Have you tried adding an explicit check with an if block and checking the results ? For e.g.

if (element.clickable()) {
	element.click().fill().with(imagePath);
} 

It is not a solution to your problem but might help you uncover where the issue.

From the snippet, it seems that clicking on the element opens up another text or input field. It might be worth checking whether that input field itself is clickable/editable before fill().with(imagePath).

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Sorry that's not what FL is doing differently than Selenium please find examples in the internet and reuse.

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