问题似乎是gf-kautomata-pipeline-ui使用的是Angular 9，而@angular/http需要Angular 7。(@angular/http已经弃用并最终被移除，它的所有功能都被移到了@angular/common中。)

见:https://www.npmjs.com/package/@angular http

如果你运行的是Angular 9，那么

从包中删除@angular/http。json(在Angular 9中你不需要它) 确保你的package.json中有@angular/common。 运行npm i。

如果你运行的是Angular 7，那么打开你的包。检查并确保你所有的Angular包都不高于^7.0.0。你可能还需要删除gf-kautomata-pipeline-ui，或者联系gf-kautomata-pipeline-ui的作者，看看这个库是否与Angular 7兼容。

首先要了解问题。以下是我的错误:

npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: project-admin@11.0.0
npm ERR! Found: @angular/common@11.0.3
npm ERR! node_modules/@angular/common
npm ERR!   @angular/common@"11.0.3" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer @angular/common@"^9.1.0 || ^10.0.0" from @agm/core@3.0.0-beta.0
npm ERR! node_modules/@agm/core
npm ERR!   @agm/core@"3.0.0-beta.0" from the root project

首先，你应该从下到上读这道题。这里@agm/core@3.0.0-beta.0需要通用的angular 9.1.0或10.0.0。最上面的消息说，角的公共发现实际上是11.0.3。

(如果你想更好地理解依赖关系，这里有一个非常简单的网站:如何npm3工作)

dependencies — these are the essential dependencies that you rely on and call in your project’s code
devDependencies — these are your development dependencies, for example, a prettier library for formatting code
peerDependencies — if you set a peer dependency in your package.json, you are telling the person who installs your package that they need that dependency with the specified version
optionalDependencies — these dependencies are optional and failing to install them will not break the installation process
bundledDependencies — it’s an array of packages that will come bundled with your package. This is useful when some 3rd party library is not on NPM, or you want to include some of your projects as modules

So what should be the solution then? The problem is about peer dependencies. The solution is to downgrade angular common or the solution is to use legacy dependencies logic for installing packages using --legacy-peer-deps. So --legacy-peer-deps does not try to install the peerDependencies automatically. Is this going to work for you? Probably, yes. But you should add specific instructions how to do that, or to make the use of --legacy-peer-deps automatic for future installation of the project packages with this code from one of the previous answers:

npm config set legacy-peer-deps true

In my case I installed the package and I tried to run ng serve, but because --legacy-peer-deps was used, there were dependency packages which were not installed. I had to install those manually (because I did not set the configuration from the code above). At the end installing about five packages manually, all with --legacy-peer-deps, I ended to a package that could not be installed and I did not try to continue, because my project was throwing warnings like crazy and there were a lot of packages for audit too. So my decision was not to use this package and to find an alternative.

我读到的其他解决方案:

downgrade Node.js to v14. This will downgrade npm. It might not be v14, but this was the version that was most widely downgraded to. Some people use Yarn to force package installation - personally I don't understand how this works, because I haven't used Yarn. downgrading Angular and the global Angular CLI version to version that will satisfy the requirement. In my case it is angular/common, and in the question it's angular/core, but both require downgrading the whole angular right (I am not sure about this here). the package you install might have a higher version that doesn't require downgrading Angular. You might try to use the https://updatepackagejson.com/ to upgrade your packages to the latest, but this is in case your project is quite new.

尝试删除节点模块和包锁。Json文件，运行命令NPM install 或 试试npm cache clean——force

最后，我找到了答案。试试这个命令-

npm install --save --legacy-peer-deps

此处描述legacy-peer-deps

我只是更新了我的Node.js，它为我工作:

node -v

输出:

V xxxx

And:

sudo npm install -g n

(使用此命令安装稳定节点release)

sudo n stable

NPM可用于在项目中安装和管理依赖项的版本。

我在React版本和npm版本上也遇到了同样的问题:

NPM错误发现类型/react@16.14.20

因此，它可能是需要根据您的包安装的包版本。json文件。

它会在npm 7版本中给出错误，并且无法安装Node.js模块。

如果你将npm版本降级到6，这些问题将变成警告，问题将得到解决。

试着证明这个命令:npm install -g npm@6 检查版本是否已经安装:npm——version 删除并安装node_modules包: a)删除rm -rf node_modules b)安装:npm i