nooriemad08 unfortunately it looks like that extension just isn't compatible with your version of flarum. However, you can probably try to upgrade it yourself (look at how other language packs work to see what you need to change in the code) or start from scratch and make your own.

      More specifically, the error is because the package has never been added to Packagist. The only reference on this forum seems to date back to 2018 https://discuss.flarum.org/d/3216-persian-farsi-language-pack/14

      I just checked as well, the extension won't work past beta 7, so work would be needed to update it anyway.

      Generally, extensions that don't have a discussion under the Extension tag here never reached a "ready to use" state.

        4 days later