wi fi – Android phone: suddenly unable to connect to wifi

I’m having trouble connecting to a wifi network on my android phone.

I was connecting just fine for the last few months, but today it just stopped connecting.

It’s not airplane more, and I haven’t run any updates.

I tried “forgetting the network” and reconnecting again, but it keeps saying “Couldn’t connect to network”.

Have I been blocked? Is there anything I can do?