Problem Installing ATTinyCore on Arduino IDE 2.3.6

[Mauro5049]

Hello there!
I've attempted to install the ATTinyCore platform on the latest Arduino IDE release (2.3.6), but am encountering the following error:

This seems to be related to issue #891, though it's - apparently - been solved.

[TheRealMopcornPuncher]

I've also got this issue:
[Steps to recreate]

• Add "http://drazzy.com/package_drazzy.com_index.json" to additional board URLs in IDE preferences
• Close IDE and refresh until new boards appear in board manager
• Install all boards from "Spence Konde"
• Check debug/error terminal: Same message as OP appears in exactly the same way with exact same message contents

[TheRealMopcornPuncher]

UPDATE: Found a temporary solution, you can use the older version of the IDE they recommend (1.8.13) with this internet archive installer from Arduino for said version: https://archive.org/details/arduino-1.8.13-windows

EDIT: Not even that works.... nvm ;-;

[ahmedibrrahim]

I'm facing the same issues. And can't install ATTinyCore on Arduino IDE. I tried to install an old version (1.3.0) from the boards manager and it works fine. But, it does not support ATTiny85 Micronucleus/Digispark, which I use. Once I select any version above 1.3.0 it raises the same error "Failed to install error unknown". So, I can't install version 1.5.2. which is weird!