Won't connect to wireless

My tablet drops the wireless connection, then will not connect. It's all connections when it drops, won't connect to home network or phone hotspot. Downloaded Wi-Fi manager from GP but all it does is show info on connections. This seems to be a problem with the tablet, not my connections. Other devices work fine.

When it doesn't connect, it either gives an authentication error, or it will say "saved". Since the problem happens with all the connections, and other devices will connect, I'm not sure what it could be.