@adsarge1 

That issue appears to be more of an internet issue than a router issue however it is a renewed unit that does pose a question to me. 

First I would bypass the router and connect a pc direct to the modem and see if the issue continues as a test. 
 

If the pc test does not see the error, the I would do a factory reset.

Other things to check if you still have the issue:

Are you using the correct power adapter (the one the that came with the router should be correct but since it is a renewed unit, compare it with the one at the church). 
Do you have any USB devices attached if so, try without them.

Try without any ethernet devices connected.

If using a UPS, try without it as I have seen strange things when the battery goes bad.

If no UPS, try different power outlet with different things attached as it may be a power surge caused by another appliance. 
Swap the router with the one at the church for a day or so. 
Try a different router (I keep my old one just for that). 
 

Let us know what works so it may help others.