I use the tool of Magento for migration data from Magento 1 to Magento 2. After run command lines:

php -dmemory_limit=3G bin/magento migrate:settings vendor/magento/data-migration-tool/etc/opensource-to-opensource/ -r

php -dmemory_limit=3G bin/magento migrate:settings vendor/magento/data-migration-tool/etc/opensource-to-opensource/

php -dmemory_limit=3G bin/magento migrate:data -a vendor/magento/data-migration-tool/etc/opensource-to-opensource/

Then I try login load Admin page and it show a bug: Expecting a string, got NULL enter image description here

I migarion data from Magento to Magento 2.3.3.

Log file:

{"0":"Expecting a string, got NULL","1":"#1 Zend\Uri\Uri->parse(NULL) called at [vendor/magento/module-backend/App/Area/FrontNameResolver.php:140]\n#2 Magento\Backend\App\Area\FrontNameResolver->getHostWithPort(NULL) called at [vendor/magento/module-backend/App/Area/FrontNameResolver.php:129]\n#3 Magento\Backend\App\Area\FrontNameResolver->isHostBackend() called at [vendor/magento/module-backend/App/Area/FrontNameResolver.php:106]\n#4 Magento\Backend\App\Area\FrontNameResolver->getFrontName(true) called at [vendor/magento/framework/App/AreaList.php:73]\n#5 Magento\Framework\App\AreaList->getCodeByFrontName('admin') called at [vendor/magento/framework/App/Http.php:132]\n#6 Magento\Framework\App\Http->launch() called at [vendor/magento/framework/App/Bootstrap.php:261]\n#7 Magento\Framework\App\Bootstrap->run(&Magento\Framework\App\Http\Interceptor#00000000105de3ff000000006232b19b#) called at [index.php:41]\n</pre>","url":"/admin/admin/index/index/key/e6618748e3cbb6430e0c0b54585a0d1938b8fb4c3636584e5f82a21286ef06a1/","script_name":"/index.php"}

Any help would be appreciated!

  • did you checked log file ? may be there a brief error
    – Pawan
    Jan 15, 2020 at 7:17
  • Thank you! I can't find anything log file. Jan 15, 2020 at 7:42
  • as per your screen shot, there should be an error log for above error i.e Error log record number: 1127444864753.
    – Pawan
    Jan 15, 2020 at 8:08
  • I have updated it, Thank you! Jan 15, 2020 at 9:05
  • 1
    Glad to know that!
    – Pawan
    Jan 16, 2020 at 4:33

1 Answer 1


I have fixed it by run command line:

php bin/magento setup:upgrade

php bin/magento setup:static-content:deploy -f

Hope it will help someone!

  • 1
    it helped me! Thanks
    – Chris
    Aug 17, 2020 at 15:46
  • 1
    You're very welcome! Oct 12, 2020 at 7:52
  • 1
    It was very successful! Mar 16, 2021 at 5:53

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