Calamares stalling on fresh install

Installing on my third EndeavourOS machine (new laptop Thinkpad T14, fresh install, brand new machine). The other two installations went perfectly, but on this one Calamares just gets stuck at the 37% mark after downloading a lot of packages (can’t tell if it’s all of them), nothing happens for at least an hour, the log just says “a process is running in the background…” over and over again.

I cancelled the first attempt because I had to go out and wasn’t expecting it to take so long from previous experience.

I tried again, and the same thing has happened.

Internet speeds and connection seems fine. Any ideas?