I have had a similar error more and more recently. It may be due in part to most download services switching from FTP to HTTP. I've tried editing the URL's and other parameters, but with limited success.
Have you considered using MGEX rather than IGS? That's my first choice because it does GPS and GLONASS at the same time. It was broken a few months ago, but I see that they fixed it with the 5.90 release.
------------------------------
Bob Epstein
------------------------------
Original Message:
Sent: 06-15-2023 17:17
From: Thomas McDermott
Subject: Getting error message when trying to download IGS orbit data
Hello all! Been using TBC for years, but I'm new to this forum. I'm doing GPS processing, and when I try to download the IGS Orbit data I get this:

I've never had this problem, not sure why this is happening. I've recently upgraded to 5.81, but this starting happening before I upgraded. Any idea why this is occurring? Thanks all.
Tom
------------------------------
Thomas McDermott
------------------------------