Magento 2.1.6 Conflicting components dependencies

Question

with a fresh install of Magento 2.1.6, I'm trying to install any compatible extension, and I always get this message below:

Check Component Dependency We found conflicting component dependencies. Hide detail

For additional assistance, see component dependency help.

with no further explanation letting me know what's the problem

everything else seems to be working fine "Cron jobs", I tried everything on the web

• expanded my memory.

• managed users.

Answer 1

You may see "require-dev" tag in composer.json file.

Run composer install or update with --no-dev flag. This will not install developer dependency packages.

composer install --no-dev

OR

composer update --no-dev

Answer 2

Removing the following from composer.json worked for me also to get past this issue.

},
"require-dev": {
    "phpunit/phpunit": "4.1.0",
    "squizlabs/php_codesniffer": "1.5.3",
    "phpmd/phpmd": "@stable",
    "pdepend/pdepend": "2.4.0",
    "fabpot/php-cs-fixer": "~1.2",
    "lusitanian/oauth": "~0.3 <=0.7.0",
    "sebastian/phpcpd": "2.0.0"
},

Would be really interesting to know why removing this worked?

Answer 3

After two days trying different things, also worked for me the following:

Removing the following from composer.json worked for me also to get past this issue.

}, "require-dev": { "phpunit/phpunit": "4.1.0", "squizlabs/php_codesniffer": "1.5.3", "phpmd/phpmd": "@stable", "pdepend/pdepend": "2.4.0", "fabpot/php-cs-fixer": "~1.2", "lusitanian/oauth": "~0.3 <=0.7.0", "sebastian/phpcpd": "2.0.0" },

Thanks

Answer 4

It happened with me, open this file on your module:

app/code/NEWMODULE/NAME/etc/module.xml

Then check the dependencies, and check if you have all dependencies modules installed and enable.

You can check the modules enabled using this command:

php -f bin/magento module:status

Answer 5

Yes removing below lines from composer.json worked for me as well

    },
"require-dev": {
    "phpunit/phpunit": "4.1.0",
    "squizlabs/php_codesniffer": "1.5.3",
    "phpmd/phpmd": "@stable",
    "pdepend/pdepend": "2.4.0",
    "fabpot/php-cs-fixer": "~1.2",
    "lusitanian/oauth": "~0.3 <=0.7.0",
    "sebastian/phpcpd": "2.0.0"
},

Thank you for the solution !!

Answer 6

Chiming in because the above solutions didn't work for my instance. In the Magento root directory, I changed the memory_limit in .htaccess and .user.ini to 2G (from 756M) and I was able to proceed.