I get the exact same error
java.net.preferIPv4Stack=true
Extracting json
Extracting json
Considering minecraft client jar
Considering minecraft client jar
Downloading libraries
Downloading libraries
Considering library net.minecraftforge:forge:1.13.2-25.0.45
File exists: Checksum validated.
.......
Data pack.mcmeta
Output: C:\Users\*****\AppData\Roaming\.minecraft\libraries\net\minecraft\client\1.13.2\client-1.13.2-slim.jar Checksum Validated: 46c94ec3485ec35fe1826ca17ecfd5e10bb17c9c
Processor failed, invalid outputs:
C:\Users\*****\AppData\Roaming\.minecraft\libraries\net\minecraft\client\1.13.2\client-1.13.2-extra.jar
Expected: b04f3ee8f5e43fa3b162981b50bb72fe1acabb33
Actual: 938487f223e08b48c7b40dc7aa40a34b9dea2520
Before running the installer I have tried:
a) Updated the launcher to the latest version
b) Ran the latest version of minecraft
c) Checked that I had the latest version of Java installed, which I do, apparently
d) Deleting 1.12 version in the launcher
e) Deleting 1.13.2 version of optifine from launcher
file I am using is:
forge-1.13.2-25.0.45-installer.jar
Any help would be greatly appreciated
Thanks