Water conditions are not optimal and the zooxanthellae probably bailed which lead to bleaching it's in rough shape, but not dead.
If someone is new to the hobby, I tell them to wait until they learn how to keep their water conditions stable - that timeframe can be different for everyone.
What needs to be kept stable/test for - temp, salinity, nitrates, phosphates, magnesium, calcium and alkalinity. anemones like stable, reef conditions
Too much light can also cause issues. some anemones like a lot of light, and some only like a little. it's about keeping the symbiotic relationship with the zoox in check.