Some online shoppers trying to shop Amazon.com Friday said the site was not operating properly, if at all.

Reports of issues loading Amazon.com pages began growing Thursday night, and web performance monitoring services indicate the site is having issues.

Amazon.com Inc. did not immediately respond to a request for comment.

The Panopta Availability Index, a service that tracks website response times and website performance, shows Amazon.com’s average response time at 11 p.m. Central time on Thursday jumped to 2.65 seconds from its typical average of less than one second.

Dozens of consumers on Friday reported outages or loading issues with Amazon.com on DownDetector.com, which collects status reports from across the web.

Many complaints were logged by consumers on the West Coast, and some from consumers along the East Coast. Consumers indicated the site would not load, they received an error message or that the site only rendered text.

Amazon Web Services last reported serious high error rates with its S3 (simple storage solution) cloud-computing service Feb. 28. That issue caused a several-hour outage for sites running on AWS. A check of AWS’ service health dashboard shows services operating normally Friday.

Amazon.com experienced a 20-minute outage last spring, and Internet Retailer estimated the outage cost the e-retailer about $3.75 million in lost sales.

Amazon, No. 1 in the just-released Internet Retailer 2017 Top 1000, on Thursday reported it generated $35.7 billion in sales in the first quarter.