acer iconia one 7 authentication when trying to connect to wifi

Hi, i have an acer iconia 7 i was able to connect to the same router when suddenly it showed authentication error . My other android device works fine. i'm not happy with this issue frustration becoming worse when i do the same process over and over again but still not able to connect.
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  1. Best answer
    Try unplugging the router from the mains socket -- wait ten seconds -- then plug it back in.
    Now wait until the router has settled down and shows no errors before trying to connect your Iconia 7.
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