Trying to set up the 12.2 environment. I can understand it is not supported and if there are bugs, then there will be no support. However it seems odd that you cannot get the files downloaded still to at least set up environment to fix some older mod or to play around with the code to see if it can at least give a temporary fix. To make it short, it seems the pom file is giving 404. It is MDK downloaded from forge and just trying to set up environment. In one of the other mod build log I noticed it used .zip file instead, but not sure how I could change it to get the zip as zip is still there. > Task :extractMcpMappings FAILED FAILURE: Build failed with an exception. * What went wrong: Could not resolve all files for configuration ':forgeGradleMcpMappings'. > Could not resolve de.oceanlabs.mcp:mcp_stable:39-1.12. Required by: project : > Could not resolve de.oceanlabs.mcp:mcp_stable:39-1.12. > Could not get resource 'https://files.minecraftforge.net/maven/de/oceanlabs/mcp/mcp_stable/39-1.12/mcp_stable-39-1.12.pom'. > Could not GET 'https://files.minecraftforge.net/maven/de/oceanlabs/mcp/mcp_stable/39-1.12/mcp_stable-39-1.12.pom'. So my question is that if the support was dropped, then was the MCP mappings POM deleted on purpose an if so, why was it not at least mentioned in https://www.minecraftforge.net/forum/topic/79304-112114-and-lts-system/ that you can no longer even set up the environment? I do understand dropping support in meaning of bug fixes or updates of features in old builds. I would know not to come to ask for help if something is not working inside forge as it is old version, but in usual cases with older software you can still install and use it, but lack the support.