I found a fix that worked for me, might work for you, not sure if it fixes 5g networks though. I just went to wifi setting and seleted the network that was saying not available. Go into it's setting and make sure advance setting in set, and it should say IP settings, just change it to static and save it. Don't change anything, unless you know what your doing, and for me a few seconds later problem fixed. Let me know if it worked in case it's just for me so others don't waste time.
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