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Why did Robert McClure have to abandon the Investigator in Mercy Bay?

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Map of the Arctic region highlighting the Northwest Passage, a maritime route shown with a red line connecting the Atlantic Ocean near Greenland to the Pacific Ocean via the Canadian Arctic Archipelago, passing north of Canada and Alaska through the Bering Sea. Major islands and surrounding countries such as Russia, Norway, Denmark (Greenland), the United States (Alaska), and Canada are labeled.
Northwest Passage

Sir Robert McClure was compelled to abandon the Investigator in Mercy Bay because the ship became trapped in the ice for two years.12

While searching for the lost Franklin expedition, McClure had navigated the Investigator into the Arctic from the Pacific, eventually rounding Banks Island and entering Mercy Bay on its north coast. After the vessel remained frozen in the ice, the crew was eventually rescued by another expedition, allowing them to return home in 1854.12