@Niece97
First try restarting both the router and the Roku to see if it reconnects.
If not, you will need to verify by logging into your router that your 2.4ghz band is configured properly
2.4ghz--> Radio On/Enabled, SSID (network name) Broadcasting/On, Mode/Protocol set to b/g/n, Wireless Channel set to a channel between 1 and 11 (1, 6, 11) preferred, and Bandwidth/Channel Width set to 20mhz.
Post back with an update or you need more help with the above. Provide model number of router and ISP (internet service provider).
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