What’s the Arduino version you’re using?
Did you restart your Arduino IDE?
What’s your operating system?
Without further information it is very difficult to find out what might be wrong.
Double-check that you’ve inserted the link properly.
If it doesn’t work, I can only recommend trying to install everything from the start.
I have the same issue.
However, it looks like the IDE can’t find the files:
This interface won’t let me paste a cut from the IDE…
I’m following your question here: https://rntlab.com/question/no-https-dl-espressif-com-dl-package_esp32_index-json/