Update Compilation-error-Error-2-UNKNOWN-platform-not-installed.md

Author: Renat0Ribeir0

content/Software and Downloads/IDE2.0/Compilation-error-Error-2-UNKNOWN-platform-not-installed.md

@@ -8,4 +8,4 @@ When compiling or uploading, the following error appears in the output panel.
 Compilation error: Error: 2 UNKNOWN: platform not installed
 ```
 
-This error appears when the required *board core* is not installed. Please ensure the core is installed using [this guide](https://www.arduino.cc/en/Tutorial/getting-started-with-ide-v2/ide-v2-board-manager#installing-a-core).
+This error appears when the required *board core* is not installed. Please ensure the core is installed using [this guide](https://docs.arduino.cc/software/ide-v2/tutorials/ide-v2-board-manager).