Search for a ticker symbol using the Yahoo Finance bang, eg "fxaix !yf", on kagi.com and it redirects to:
https://finance.yahoo.com/q?s=fxaix
which then automatically redirect to:
https://www.yahoo.com/?err=404&err_url=https%3A%2F%2Ffinance.yahoo.com%2Fq%3Fs%3Dfxaix
Previously, a Kagi search such as "fxaix !yf" (or any other ticker symbol) would load the appropriate quote page, eg https://finance.yahoo.com/quote/FXAIX/ .