Login for ETC One is not possible on Safari macOS 15.1 beta. The website looks wired. Other browser works.
Seconding this issue... I ran into it on my iphone onsite when attempting to log into my account as well. This happens when using Safari on iOS. I am running iOS 18.0.1 on an iPhone 16 Pro.
I updated my non production macs and iPhone to the latest 18.1 beta and I have no problems.I think the release of 18.1 is scheduled to next week.