Aloonus

I just installed the slightly older version as the change log doesn't appear to show that there's any great difference in functionality between the 2. forge-1.13.2-25.0.44-installer.jar installed without any problems.

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