Erro 400 密钥正确，网络顺畅，但是deepl引擎无法使用

[LEXPERIA128]

Is there an existing issue for this?

• [X] I have searched the existing issues

Have you checked the FAQ (https://github.com/windingwind/zotero-pdf-translate/issues/6)?

• [X] I have checked the FAQ

Are you using the latest Zotero and the latest plugin?

• [X] I have confirmed I'm using the latest Zotero and the latest plugin

Environment

• OS: win11 23H2
• Zotero Version: 7.0.9.0
• Plugin Version:2.0.4

Describe the bug

输入deepl免费密钥之后，出现如图错误

Debug Output

无

Anything else?

No response

[windingwind]

请截图deepl订阅界面

[jinjingisme]

[windingwind]

请截图deepl订阅界面