Lowe’s IT is doing site maintenance or fixes in the background, and nothing can be processed properly at that time. Best to hold out to purchase to avoid even more check out processing errors. This is NOT a Coupon Error. It’s a Site/System Error. Be Patient.
A. Daily Maintenance: Lowes tends to do site maintenance and fix around midnight PST, sometimes 9 AM morning avg 15 mins (longer sometimes). Site gets buggy, error 500 messages, empty cart, or “Bar code promotion could not be processed,” etc. Avoid making purchases then, wait 15, 30 minutes, refresh page and retry. *Saturday nights usually have earlier maintenance time around 11:00 PM EST.*
B. Big Update or Major System Error: Every once in a while Lowes does this big maintenance or have issue with their site that will take more than 30 minutes to do – can be a whole day or days. Usually before a big sale season like Christmas year end sale, Black Friday and Spring Black Friday sales, lots of sale items going in and out. Lowes site will take a bit more time to update their site, unlike the small daily sale changes if any. Major Site/System Error is more regarding their main computer, which connects to not only us but also to the stores, not processing properly.