Can't install SupportCenter

I am using a Dell Inspiron 16 5620. It came installed with the old version of SupportAssist that wouldn't launch correctly. I tried using the official migration tool on the Dell Drivers & Downloads site, and it installed a program called "Dell SupportAssist" (not the regular "SupportAssist" my computer came with without "Dell" in the name). However, neither would launch. I did some Googling and it turns out they might've been failing due to corrupted system components, so I uninstalled all Dell-specific applications from my computer. However, when I tried to download the new version of SupportAssist, it said "We ran into a problem. Please restart your computer and try again." I've tried restarting multiple times to get the same error. How do I fix it?