524 error

Since work was done by Xfinity in my neighborhood recently, I have been experiencing 524 errors when attempting to download data files from a data warehousing site that I use for work. I have successfully downloaded large files from this site in the past. I have worked with my company's IT administrator to confirm this is not an issue with my work computer (browser cache, storage, CPU, etc) and have conferred with the website engineers that this is not an issue on their side either (They confirmed the 524 error). I am connected to my Arris Surfboard via ethernet cable, and I upgraded to the 800mbps plan last week.