This is a common problem you will need to disconnect at the sink and then I pulled up a new line from there to the back of the fridge. Replaced the cheap plastic line with the braided hose from HD.. even after that I have not turned the ice maker back on as I don't trust that it wont leak from traveling. Since we are not full time we don't need ice anyway not worth the trouble of water damage. Turned off at the shut off valve under sink.
2020 Newmar Baystar