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I have 2.3 and i used it a few months ago but I lost the vendor file my hd crashed would anyone be willing to upload the core 2.3 vendor folder please I got the rest from git not sure how to use composer
Sure, it's recommended to download the package from here anyway: https://open.vanillaforums.com/get/vanilla-core-2.3.1
why are you using github? if you downloaded from master that is not a stable version.
Please use the normal upgrade procedure.
grep is your friend.