An issue has been detected with Gravestone Extended mod, I am currently investigating the cause...
Install MineTech World
Step 1
Installing a modpack using the Technic Launcher is easy. If you don't already have the launcher downloaded, visit our download page to get the latest version.
Step 2
Type in the modpack name (MineTech World) or paste the following url into the search box.
Step 3
Finally, click Install at the bottom right of the launcher after you select MineTech World from the list on the left. The launcher will handle everything else!
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