I generated a seed and played through it. When I wanted to save the link to the seed (cause I liked my time) it generated this error:
Game not found
We're sorry, the Game you are looking for cannot be located at this time.
This is the link I was given:
https://alttpr.com/en-US/h/Rv2lerB2Gl
And navigates to:
https://alttpr.com/en/en-US/h/Rv2lerB2Gl
When I generated another seed, it did not have the "en-US" in the link, but rather just "en", and navigated correctly. I was able to get the seed to load in the site by removing the "en-US" from the link, but thought this was worth a quick bug report.