My friend is spying on our ycfteam website. But the page he was trying to access was never found later.
Link: https://ycfteam.inarrow-up-right
After reading the description, I went to Wayback Machine
Wayback Machine
Checking the URLs list, the 4th one is similar to the challenge description
Visting that url, we get the flag
Last updated 2 years ago
YCTF{n3v4r_mi55_f0ur_o_f0u4}