An ice maker that stopped usually isn't getting water or isn't cold enough — a frozen fill tube, a clogged or overdue water filter, a kinked supply line, or a freezer running too warm.
An ice maker needs two things: water in, and a freezer cold enough to freeze it on schedule. Most failures are a water-supply problem (filter, fill tube, supply line) or a temperature problem (freezer too warm). Both are usually owner-fixable.
Check these in order. The first accounts for most cases.
The small tube that delivers water to the ice mold freezes shut, so no water reaches the tray. Common after a temperature swing or a slow leak.
A water filter past its service life restricts flow enough to starve the ice maker. Many fridges should have the filter changed every ~6 months.
A pinched water line behind the fridge, or a partially closed saddle/shutoff valve, cuts the water the ice maker needs.
A freezer above ~10°F (-12°C) won't cycle ice properly; the wire shutoff arm may be flipped up; or the water inlet valve has failed.
Follow these in order. Stop as soon as the problem clears.
Make sure the wire arm is down (or the on/off switch is on). If it's up, the ice maker is simply paused.
If the filter is overdue, replace it. A clogged filter is a very common, easy-to-miss cause of low or no ice.
Unplug or move food, and use a hair dryer on low or a cup of warm water to thaw the fill tube behind/above the ice maker. Clear any ice plug.
Pull the fridge out, straighten any kink in the water line, and confirm the shutoff valve is fully open.
Set the freezer to about 0°F (-18°C). If it's running warm, fix the cooling problem first — a warm freezer won't make ice on schedule.