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Simply overwriting files with 2.1.3 fixed the problem
Filed an issue on GitHub: https://github.com/vanilla/vanilla/issues/2218 This must be fixed urgently.
Someone else has been faster: GitHub: https://github.com/vanilla/vanilla/issues/2214
Will someone test this fix please: https://github.com/vanilla/vanilla/commit/d6ac742665a19fdc144c4dc6222fa1b4727993b2
I've already commented those lines out and everything went smoothly.