Not Installing - Gradle unable to delete file minecraft_server.jar

Status
Fixed
Issue description

I always get this bug when attempting to load MCreator to my pc 1st time:
   

Executing gradle command: cleanCache clean setupDecompWorkspace --refresh-dependencies
Microsoft Windows [Version 10.0.16299.125]
(c) 2017 Microsoft Corporation. All rights reserved.
D:\MCreator177>cd forge
D:\MCreator177\forge>SET "JAVA_HOME=D:\MCreator177\jdk64\"
D:\MCreator177\forge>SET JAVA_EXE=%JAVA_HOME%\bin\java.exe
D:\MCreator177\forge>SET PATH=%JAVA_HOME%\bin\;%PATH%
D:\MCreator177\forge>gradlew -Dorg.gradle.jvmargs="-Xms625m -Xmx2048m" cleanCache clean setupDecompWorkspace --refresh-dependencies 
This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.
#################################################
         ForgeGradle 2.3-SNAPSHOT-e65f1e2        
  https://github.com/MinecraftForge/ForgeGradle  
#################################################
               Powered by MCP unknown               
             http://modcoderpack.com             
         by: Searge, ProfMobius, Fesh0r,         
         R4wk, ZeuX, IngisKahn, bspkrs           
#################################################
:cleanCache FAILED
FAILURE: Build failed with an exception.
BUILD FAILED
* WhatExecution faiTotal time: 2 mins 9.232 secs
led for task ':cleanCache'.
 went wrong:
> Unable to delete file: C:\Users\User\.gradle\caches\minecraft\net\minecraft\minecraft_server\1.12.2\minecraft_server-1.12.2.jar
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
D:\MCreator177\forge>
Task completed with return code 0 in 129631 milliseconds

 

Issue comments

Try to go in C:\Users\User\.gradle\caches\minecraft\net\minecraft\minecraft_server\1.12.2\ folder and manually remove file minecraft_server-1.12.2.jar from this folder. After you do this, uninstall MCreator and install it again. Please report back if this worked.