Vercel提示：
Build Failed
statCache does not contain value for tags/\n (resolved to /vercel/path0/public/tags//n)
Build Logs 提示：
19:03:17.358 Cloning github.com/imldy/my-hugo-blog (Branch: main, Commit: 717bf90)
19:03:18.102 Cloning completed: 743.97ms
19:03:18.160 Analyzing source code...
19:03:19.054 Installing build runtime...
19:03:21.720 Build runtime installed: 2.666s
19:03:24.641 Build cache not provided
19:03:25.605 Installing Hugo version 0.82.0
19:03:26.307 Start building sites …
19:03:26.548 | EN
19:03:26.548 -------------------+------
19:03:26.548 Pages | 180
19:03:26.549 Paginator pages | 10
19:03:26.549 Non-page files | 0
19:03:26.549 Static files | 5
19:03:26.549 Processed images | 0
19:03:26.549 Aliases | 101
19:03:26.549 Sitemaps | 1
19:03:26.549 Cleaned | 0
19:03:26.549 Total in 263 ms
19:03:26.853 AssertionError [ERR_ASSERTION] [ERR_ASSERTION]: statCache does not contain value for tags/\n (resolved to /vercel/path0/public/tags//n)
19:03:26.853 at glob (/vercel/ca3b2ac053d43b3d/.build-utils/node_modules/@vercel/build-utils/dist/index.js:29118:25)
19:03:26.853 at Object.build (/vercel/ca3b2ac053d43b3d/.build-utils/.builder/node_modules/@vercelruntimes/static-build/dist/index.js:13992:26)
19:03:26.853 at buildStep (/var/task/webpack:/@zeit/api/scripts/build-container/src/utils/purpose-build.ts:163:1) {
19:03:26.853 generatedMessage: false,
19:03:26.854 code: 'ERR_ASSERTION',
19:03:26.854 actual: undefined,
19:03:26.854 expected: true,
19:03:26.854 operator: '=='
19:03:26.854 }
设置Build Command无果、在Environment Variables设置Hugo版本无果、设置Node.js Version无果，重新建项目无果，最后发现是有名为\n的标签导致的。
再仔细研究，发现我有一篇文章的标签是这样写的:
tags:
- \r
- \n
在Hexo和Hugo中，本地生成后，URL为https://imldy.cn/tags/n/，还算正常，而Vercel可能是重新实现了一遍Hugo，导致与Hugo官方的有差异。
改为
tags:
- "\r"
- "\n"
正常Build。
中途还怀疑过可能是 Vercel 无法处理 submodule，事实是与 Git 的submodule并无关系。