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please help, magento 2.2.6 to 2.3 upgrade fails with composer
I tried to upgrade my 2.2.6 Magento install with composer following the tutorial on Magento Website, but "composer update" fails with these errors below:
Problem 1
- magento/inventory-composer-installer 1.0.3 requires composer-plugin-api ^1.1 -> no matching package found.
- magento/product-community-edition 2.3.0 requires magento/inventory-composer-metapackage ^1.0.3 -> satisfiable by magento/inventory-composer-metapackage[1.0.3].
- magento/inventory-composer-metapackage 1.0.3 requires magento/inventory-composer-installer ^1.0.3 -> satisfiable by magento/inventory-composer-installer[1.0.3].
- Installation request for magento/product-community-edition 2.3.0 -> satisfiable by magento/product-community-edition[2.3.0].
Potential causes:
- A typo in the package name
- The package is not available in a stable-enough version according to your minimum-stability setting
see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details.
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Re: please help, magento 2.2.6 to 2.3 upgrade fails with composer
Try to remove vendor directory and re-hit the command.
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Re: please help, magento 2.2.6 to 2.3 upgrade fails with composer
Looking at the error it sees like package is are not compatible with your PHP version.
Which PHP version are you using ?