@dmc03a I don't know if you are still having this problem. I also encounter it from time to time. One such site is https://www.biblicalarchaeology.org - It only seems to happen with Opera. When I get the error, I just copy and paste the link into another browser and it works as expected.
Using...
Opera One(version: 114.0.5282.235)
Update stream: Stable
System: Windows 11 64-bit
Chromium version:128.0.6613.186