CODEWITHSUNDEEP
laravel-5composer-php
AlexB
AlexB

Reputation: 2174

Composer dump-autoload or update results in fatal error on Laravel 5.5

Just tried to run a composer dump-autoload, but ended up with the following error, which I have never had previously

Class UpdateHelper\ComposerPlugin contains 2 abstract methods and must therefore be declared abstract or implement the remaining methods (Composer\Plugin\PluginInterface::deactivate, Composer\Plugin\PluginInterface::uninstall) in /var/www/vhosts/example.com/vendor/kylekatarnls/update-helper/src/UpdateHelper/ComposerPlugin.php on line 11

Searched on G to find some answers, but found nothing even remotely close the problem I am having here.

Any suggestions?

Upvotes: 22

Views: 34516

Answers (6)

ChinhNV
ChinhNV

Reputation: 351

Please delete or change name the directory "kylekatarnls" and composer update

1, mv kylekatarnls kylekatarnls_bk or rm -rf kylekatarnls

2, composer update

=> Success

Upvotes: 4

Zahid
Zahid

Reputation: 604

This worked for me:

rm -rf vendor
rm -f composer.lock
composer install

Upvotes: 3

An Tran T.
An Tran T.

Reputation: 162

Downgrade Composer to version 1 worked for me.

composer self-update 1.10.22
rm -rf vendor
composer install

Upvotes: 5

AlexB
AlexB

Reputation: 2174

I just found a solution to this problem. Here it is for those who have the same problem.

I have had to delete the directory kylekatarnls located inside my vendor directory then run composer update --prefer-source and after that composer dump-autoload.

Now all is working just fine.

Upvotes: 54

Sam
Sam

Reputation: 492

It seems like you're using Composer v2. If so, read on...

Composer v2 adds some new functions to their Plugin interface (namely deactivate() and uninstall())

However kylekatarnls/update-helper < v1.2.1 is implementing said interface but does not implement the new functions.

So to fix, you'll need to update kylekatarnls/update-helper to the latest (v1.2.1 at time of writing), which contains a fix (implements the missing methods):

composer update kylekatarnls/update-helper

Upvotes: 13

Jose Juan Calvo
Jose Juan Calvo

Reputation: 106

I remove the vendor directory and the composer.lock file. After execute composer install and all works well.

Upvotes: 7

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