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We have a website built in Craft 3.4.14 and we are moving it to a hosting company with CentOS 7, using Plesk Obsidian 18.0.5.

The hosting company has told us that they have upgraded Composer from version 1 to version 2. On my local machine I have been using version 1.10. However, I try to run Composer on the server and I get these issues: -

  • craftcms/plugin-installer 1.5.3 requires composer-plugin-api ^1.0 -> found composer-plugin-api[2.0.0] but it does not match your constraint.
  • craftcms/plugin-installer 1.5.4 requires composer-plugin-api ^1.0 -> found composer-plugin-api[2.0.0] but it does not match your constraint.
  • craftcms/cms 3.4.14 requires craftcms/plugin-installer ~1.5.3 -> satisfiable by craftcms/plugin-installer[1.5.4, 1.5.3].
  • Root composer.json requires craftcms/cms 3.4.14 -> satisfiable by craftcms/cms[3.4.14].

Is there a way around these issues so that we can get Craft CMS installed please?

Thank you for your time.

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Composer 2 support has been drafted over at craftcms/plugin-installer#4. We’ll merge that in once Composer 2 is officially released.

~~In the meantime, if you really need to get Craft working with Composer 2, follow the instructions at craftcms/plugin-installer#3.~~

UPDATE: craftcms/plugin-installer and yiisoft/yii2-composer have both been updated to support Composer 2.

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  • Composer 2 has now been released and plenty of plugins are incompatible, including core plugins like Amazon S3 and redactor.
    – jishi
    Nov 1, 2020 at 22:00
  • @jishi just run composer update so you get the latest version of craftcms/plugin-installer
    – Brandon Kelly
    Nov 1, 2020 at 22:10
  • Ah, yes. So it seems. My bad!
    – jishi
    Nov 2, 2020 at 15:28

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