ANSWER:我遇到了同样的问题，以前的答案都不适合我.我使用的是 Magento 1.9 版.

ANSWER: I had the same issue and none of previous answers worked for me. I'm using Magento Version 1.9.

这是我为解决问题所做的...

Here's what i did to fix the issue...

1. 转到您的控制面板并启动 phpMyAdmin.
2. 找到您的 Magento 数据库并选择 core_config_data 表.
3. 找到并编辑以下行:
   • 范围:默认"和路径:admin/url/custom"
     • 选中NULL复选框并保存.

1. Go to your cpanel and launch phpMyAdmin.
2. Locate your Magento Database and select the core_config_data table.
3. Locate and edit the following rows:
   • Scope:"Default" and Path:"admin/url/custom"
     • Select the NULL checkbox and save.

• 将值从 1 更改为 0 并保存.

• Change value from 1 to 0 and save.

• 如果尚未将值从 1 更改为 0 并保存.

• Change value from 1 to 0 if it isn't already and save.

• 范围:商店"和路径:web/secure/base_url"
• 范围:商店" 和路径:web/unsecure/base_url"(应位于最后一页)

• Scope:"Stores" and Path:"web/secure/base_url"
• Scope:"Stores" and Path:"web/unsecure/base_url" (should be located on the last page)

你就完成！

转到您以前的管理网址，它应该可以工作！

go to your previous admin url and it should work!