Migration magento 1 to magento 2 error

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/1.9.2.4/config.xml -r php -dmemory_limit=3G bin/magento migrate:settings vendor/magento/data-migration-tool/etc/opensource-to-opensource/1.9.2.4/config.xml php -dmemory_limit=3G bin/magento migrate:data -a vendor/magento/data-migration-tool/etc/opensource-to-opensource/1.9.2.4/config.xml Then I try login load Admin page and it show a bug: Expecting a string, got NULL I migarion…

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