Syntax problems on "main" branch

Linting complains:

$ npm run lint:md

> [email protected] lint:md
> markdownlint-cli2 "**/*.md"

markdownlint-cli2 v0.7.1 (markdownlint v0.28.2)
Finding: **/*.md **/*.{md} !node_modules !.github !docs !standards
Linting: 49 file(s)
Summary: 2 error(s)
user-docs/application-examples/opendesk-on-scs/quickstart.md:3:56 search-replace Custom rule [relative-link-path: Don't use relative paths] [Context: "column: 56 text:'](..'"]
user-docs/application-examples/opendesk-on-scs/quickstart.md:26:31 search-replace Custom rule [relative-link-path: Don't use relative paths] [Context: "column: 31 text:'](..'"]

When starting a local development server, i get a huge amount of error messages.

$ npm start

> [email protected] start
> docusaurus start


 ------------------------------------------------------------------------------------------------------------------------------------                                                                                                                                                                                           Update available 3.2.1 → 3.5.2                                                                                                                                                                                                                    To upgrade Docusaurus packages with the latest version, run the following command:                                       `npm i @docusaurus/core@latest @docusaurus/plugin-client-redirects@latest @docusaurus/preset-classic@latest                            @docusaurus/theme-mermaid@latest @docusaurus/eslint-plugin@latest @docusaurus/module-type-aliases@latest                                                        @docusaurus/tsconfig@latest @docusaurus/types@latest`                                                                                                                                                                                ------------------------------------------------------------------------------------------------------------------------------------ 

[INFO] Starting the development server...
[SUCCESS] Docusaurus website is running at: http://localhost:3000/

✖ Client
  Compiled with some errors in 2.57s

Error: MDX compilation failed for file "/home/marc/src/github/osba/scs/docs/docs/02-iaas/components/image-manager.md"
Cause: Unexpected character `/` (U+002F) before local name, expected a character that can start a name, such as a letter, `$`, or `_` (note: to create a link in MDX, use `[text](url)`)
Details:
{
  "column": 8,
  "message": "Unexpected character `/` (U+002F) before local name, expected a character that can start a name, such as a letter, `$`, or `_` (note: to create a link in MDX, use `[text](url)`)",
  "line": 29,
  "name": "29:8",
  "place": {
    "line": 29,
    "column": 8,
    "offset": 974,
    "_index": 47,
    "_bufferIndex": 7
  },
  "reason": "Unexpected character `/` (U+002F) before local name, expected a character that can start a name, such as a letter, `$`, or `_` (note: to create a link in MDX, use `[text](url)`)",
  "ruleId": "unexpected-character",
  "source": "micromark-extension-mdx-jsx",
  "url": "https://github.com/micromark/micromark-extension-mdx-jsx#unexpected-character-at-expected-expect"
}

--------------------------

Error: MDX compilation failed for file "/home/marc/src/github/osba/scs/docs/docs/02-iaas/deployment-examples/cloud-in-a-box/advanced-guides/cloud-in-a-box.md"
Cause: Unexpected character `/` (U+002F) before local name, expected a character that can start a name, such as a letter, `$`, or `_` (note: to create a link in MDX, use `[text](url)`)
Details:
{
  "column": 36,
  "message": "Unexpected character `/` (U+002F) before local name, expected a character that can start a name, such as a letter, `$`, or `_` (note: to create a link in MDX, use `[text](url)`)",
  "line": 110,
  "name": "110:36",
  "place": {
    "line": 110,
    "column": 36,
    "offset": 4682,
    "_index": 0,
    "_bufferIndex": 7
  },
  "reason": "Unexpected character `/` (U+002F) before local name, expected a character that can start a name, such as a letter, `$`, or `_` (note: to create a link in MDX, use `[text](url)`)",
  "ruleId": "unexpected-character",
  "source": "micromark-extension-mdx-jsx",
  "url": "https://github.com/micromark/micromark-extension-mdx-jsx#unexpected-character-at-expected-expect"
}

--------------------------

Error: MDX compilation failed for file "/home/marc/src/github/osba/scs/docs/docs/02-iaas/deployment-examples/cloud-in-a-box/advanced-guides/testbed.md"
Cause: Unexpected character `/` (U+002F) before local name, expected a character that can start a name, such as a letter, `$`, or `_` (note: to create a link in MDX, use `[text](url)`)
Details:
{
  "column": 11,
  "message": "Unexpected character `/` (U+002F) before local name, expected a character that can start a name, such as a letter, `$`, or `_` (note: to create a link in MDX, use `[text](url)`)",
  "line": 351,
  "name": "351:11",
  "place": {
    "line": 351,
    "column": 11,
    "offset": 14871,
    "_index": 4,
    "_bufferIndex": 7
  },
  "reason": "Unexpected character `/` (U+002F) before local name, expected a character that can start a name, such as a letter, `$`, or `_` (note: to create a link in MDX, use `[text](url)`)",
  "ruleId": "unexpected-character",
  "source": "micromark-extension-mdx-jsx",
  "url": "https://github.com/micromark/micromark-extension-mdx-jsx#unexpected-character-at-expected-expect"
}
client (webpack 5.94.0) compiled with 3 errors
<w> [webpack.cache.PackFileCacheStrategy] Skipped not serializable cache item 'Compilation/modules|/home/marc/src/github/osba/scs/docs/node_modules/@docusaurus/mdx-loader/lib/index.js??ruleSet[1].rules[8].use[0]!/home/marc/src/github/osba/scs/docs/node_modules/@docusaurus/plugin-content-docs/lib/markdown/index.js??ruleSet[1].rules[8].use[1]!/home/marc/src/github/osba/scs/docs/docs/02-iaas/components/image-manager.md': No serializer registered for VFileMessage
<w> while serializing webpack/lib/cache/PackFileCacheStrategy.PackContentItems -> webpack/lib/NormalModule -> webpack/lib/ModuleBuildError -> Error -> VFileMessage
<w> [webpack.cache.PackFileCacheStrategy] Skipped not serializable cache item 'Compilation/modules|/home/marc/src/github/osba/scs/docs/node_modules/@docusaurus/mdx-loader/lib/index.js??ruleSet[1].rules[8].use[0]!/home/marc/src/github/osba/scs/docs/node_modules/@docusaurus/plugin-content-docs/lib/markdown/index.js??ruleSet[1].rules[8].use[1]!/home/marc/src/github/osba/scs/docs/docs/02-iaas/deployment-examples/cloud-in-a-box/advanced-guides/cloud-in-a-box.md': No serializer registered for VFileMessage
<w> while serializing webpack/lib/cache/PackFileCacheStrategy.PackContentItems -> webpack/lib/NormalModule -> webpack/lib/ModuleBuildError -> Error -> VFileMessage
<w> [webpack.cache.PackFileCacheStrategy] Skipped not serializable cache item 'Compilation/modules|/home/marc/src/github/osba/scs/docs/node_modules/@docusaurus/mdx-loader/lib/index.js??ruleSet[1].rules[8].use[0]!/home/marc/src/github/osba/scs/docs/node_modules/@docusaurus/plugin-content-docs/lib/markdown/index.js??ruleSet[1].rules[8].use[1]!/home/marc/src/github/osba/scs/docs/docs/02-iaas/deployment-examples/cloud-in-a-box/advanced-guides/testbed.md': No serializer registered for VFileMessage
<w> while serializing webpack/lib/cache/PackFileCacheStrategy.PackContentItems -> webpack/lib/NormalModule -> webpack/lib/ModuleBuildError -> Error -> VFileMessage