Hello,
I am starting with magento 2 and I need your help. I wanted to install a module but when i ran the upgrade comand I got a message error of compilation so I ran the compilation command but it overwrited my modules and everything I think because website and magento are now down.
I'm so bad. If someone could help me 
I'm getting those errors when I compile (see attached photo). There are more but I can't send you the logs cause I can only send you photos.
I tried to update Mageplaza_Blog extension via composer (after selfupdate of composer), the update runs but then when I run the php bin/magento setup:upgrade i'm getting this error:
Autoload error: Module 'Mageplaza_Blog' from '/home/chiajouw/public_html/app/code/Mageplaza/Blog' has been already defined in '/home/chiajouw/public_html/vendorchiajouw@uk20 [~/public_html]# php bin/magento setup:upgrade
Warning: require(/home/chiajouw/public_html/vendor/composer/../mageplaza/magento-2-blog-extension/registration.php): failed to open stream: No such file or directory in /home/chiajouw/public_html/vendor/composer/autoload_real.php on line 71
Fatal error: require(): Failed opening required '/home/chiajouw/public_html/vendor/composer/../mageplaza/magento-2-blog-extension/registration.php' (include_path='/home/chiajouw/public_html/vendor/magento/zendframework1/library:/home/chiajouw/public_html/vendor/phpunit/php-file-iterator:/home/chiajouw/public_html/vendor/phpunit/phpunit:/home/chiajouw/public_html/vendor/symfony/yaml:.:/usr/local/php56/pear') in /home/chiajouw/public_html/vendor/composer/autoload_real.php on line 71
So I think that the developper who was in the company before installed Blog extension via copy/paste in app/code and composer put in /vendor so there is a conflict but I tried to solve this with a tutorial from Mageplaza (it is a well-known error) by deleting Core module from:
- app/code/Mageplaza/Core
- vendor/mageplaza/core-m2
But even after, it is not working, I'm still getting the error.
