Class Firebase\JWT\JWT not found

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As per the documentation, you need to include the autoloader.

E.g., in your php file:

require __DIR__ . '/vendor/autoload.php';

But… typically your vendor folder would be at the same level than your html folder (the one where you are serving content).

E.g.:

- Project root
--- vendor
--- html
----- index.php

Then in your index.php you’d do:

 require __DIR__ . '/../vendor/autoload.php';

It is nice that you trying to use composer and modules, but if I were you I’d try to read on a bit about php’s autoloading features, so you understand what’s going on, and how you can profit from them.

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