error in the installation

The python package was installed, but the frontend didn't work, see below. Ideas? I am running Mac OS 13.5

```
% npm install
npm WARN EBADENGINE Unsupported engine {
npm WARN EBADENGINE   package: '@achrinza/node-ipc@9.2.2',
npm WARN EBADENGINE   required: { node: '8 || 10 || 12 || 14 || 16 || 17' },
npm WARN EBADENGINE   current: { node: 'v20.5.0', npm: '9.8.0' }
npm WARN EBADENGINE }
npm WARN deprecated stable@0.1.8: Modern JS already guarantees Array#sort() is a stable sort, so this library is deprecated. See the compatibility table on MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort#browser_compatibility
npm WARN deprecated source-map-url@0.4.1: See https://github.com/lydell/source-map-url#deprecated
npm WARN deprecated request-promise-native@1.0.9: request-promise-native has been deprecated because it extends the now deprecated request package, see https://github.com/request/request/issues/3142
npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated
npm WARN deprecated har-validator@5.1.5: this library is no longer supported
npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated
npm WARN deprecated source-map-resolve@0.5.3: See https://github.com/lydell/source-map-resolve#deprecated
npm WARN deprecated circular-json@0.3.3: CircularJSON is in maintenance only, flatted is its successor.
npm WARN deprecated fsevents@1.2.13: The v1 package contains DANGEROUS / INSECURE binaries. Upgrade to safe fsevents v2
npm WARN deprecated chokidar@2.1.8: Chokidar 2 does not receive security updates since 2019. Upgrade to chokidar 3 with 15x fewer dependencies
npm WARN deprecated fsevents@1.2.13: The v1 package contains DANGEROUS / INSECURE binaries. Upgrade to safe fsevents v2
npm WARN deprecated chokidar@2.1.8: Chokidar 2 does not receive security updates since 2019. Upgrade to chokidar 3 with 15x fewer dependencies
npm WARN deprecated uuid@3.4.0: Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated @hapi/topo@3.1.6: This version has been deprecated and is no longer supported or maintained
npm WARN deprecated consolidate@0.15.1: Please upgrade to consolidate v1.0.0+ as it has been modernized with several long-awaited f## holpy

Implementation of higher-order logic in Python.

### Verification of symbolic integration:

See README file in the [`integral`](integral/) directory.

### Unit tests

Unit tests for the backend are located in files of the form ```*/tests/*_test.py```.

Run all unit tests on Windows:

```python -m unittest discover -p *_test.py```

On Linux:

```python3 -m unittest */tests/*_test.py```

### Installation and usage:

This project requires Python 3.5 or greater and npm:

https://www.python.org/download/releases/3.0/:

https://www.npmjs.com/

Required packages are listed in requirements.txt. To install required packages in the
global environment, you can use:

```python -m pip install -r requirements.txt```
...skipping...
ixes implemented. Maintenance is supported by Forward Email at https://forwardemail.net ; follow/watch https://github.com/ladjs/consolidate for updates and release changelog
npm WARN deprecated @hapi/bourne@1.3.2: This version has been deprecated and is no longer supported or maintained
npm WARN deprecated @hapi/address@2.1.4: Moved to 'npm install @sideway/address'
npm WARN deprecated eslint-loader@2.2.1: This loader has been deprecated. Please use eslint-webpack-plugin
npm WARN deprecated html-webpack-plugin@3.2.0: 3.x is no longer supported
npm WARN deprecated @hapi/hoek@8.5.1: This version has been deprecated and is no longer supported or maintained
npm WARN deprecated babel-eslint@10.1.0: babel-eslint is now @babel/eslint-parser. This package will no longer receive updates.
npm WARN deprecated svgo@1.3.2: This SVGO version is no longer supported. Upgrade to v2.x.x.
npm WARN deprecated @hapi/joi@15.1.1: Switch to 'npm install joi'
npm WARN deprecated axios@0.19.2: Critical security vulnerability fixed in v0.21.1. For more information, see https://github.com/axios/axios/pull/3410
npm WARN deprecated popper.js@1.16.1: You can find the new Popper v2 at @popperjs/core, this package is dedicated to the legacy v1
npm WARN deprecated core-js@2.6.12: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

added 1637 packages, and audited 1638 packages in 3m

130 packages are looking for funding
  run `npm fund` for details

45 vulnerabilities (1 low, 14 moderate, 25 high, 5 critical)

To address issues that do not require attention, run:
  npm audit fix

To address all issues (including breaking changes), run:
  npm audit fix --force

Run `npm audit` for details.
(venv) ar@tenis app % less ../README.md
(venv) ar@tenis app % npm run serve

> ide@0.1.0 serve
> concurrently -c green,blue -n pythonserver,vueserver "npx nodemon --watch \"..\" --exec \"python\" ../app.py" "vue-cli-service serve"

[vueserver]  INFO  Starting development server...
[pythonserver] [nodemon] 2.0.22
[pythonserver] [nodemon] to restart at any time, enter `rs`
[pythonserver] [nodemon] watching path(s): ../**/*
[pythonserver] [nodemon] watching extensions: py
[pythonserver] [nodemon] starting `python ../app.py`
[pythonserver] Traceback (most recent call last):
[pythonserver]   File "/Users/ar/Temp/holpy/app/../app.py", line 2, in <module>
[pythonserver]     from app import app
[pythonserver]   File "/Users/ar/Temp/holpy/app/__init__.py", line 1, in <module>
[pythonserver]     from app.app import app
[pythonserver]   File "/Users/ar/Temp/holpy/app/app.py", line 5, in <module>
[pythonserver]     from flask.json import JSONEncoder as _JSONEncoder
[pythonserver] ImportError: cannot import name 'JSONEncoder' from 'flask.json' (/Users/ar/Temp/venv/lib/python3.11/site-packages/flask/json/__init__.py)
[pythonserver] [nodemon] app crashed - waiting for file changes before starting...
[vueserver] Error: error:0308010C:digital envelope routines::unsupported
[vueserver]     at new Hash (node:internal/crypto/hash:69:19)
[vueserver]     at Object.createHash (node:crypto:138:10)
[vueserver]     at module.exports (/Users/ar/Temp/holpy/app/node_modules/webpack/lib/util/createHash.js:135:53)
[vueserver]     at NormalModule._initBuildHash (/Users/ar/Temp/holpy/app/node_modules/webpack/lib/NormalModule.js:417:16)
[vueserver]     at handleParseError (/Users/ar/Temp/holpy/app/node_modules/webpack/lib/NormalModule.js:471:10)
[vueserver]     at /Users/ar/Temp/holpy/app/node_modules/webpack/lib/NormalModule.js:503:5
[vueserver]     at /Users/ar/Temp/holpy/app/node_modules/webpack/lib/NormalModule.js:358:12
[vueserver]     at /Users/ar/Temp/holpy/app/node_modules/loader-runner/lib/LoaderRunner.js:373:3
[vueserver]     at iterateNormalLoaders (/Users/ar/Temp/holpy/app/node_modules/loader-runner/lib/LoaderRunner.js:214:10)
[vueserver]     at iterateNormalLoaders (/Users/ar/Temp/holpy/app/node_modules/loader-runner/lib/LoaderRunner.js:221:10)
[vueserver]     at /Users/ar/Temp/holpy/app/node_modules/loader-runner/lib/LoaderRunner.js:236:3
[vueserver]     at runSyncOrAsync (/Users/ar/Temp/holpy/app/node_modules/loader-runner/lib/LoaderRunner.js:130:11)
[vueserver]     at iterateNormalLoaders (/Users/ar/Temp/holpy/app/node_modules/loader-runner/lib/LoaderRunner.js:232:2)
[vueserver]     at Array.<anonymous> (/Users/ar/Temp/holpy/app/node_modules/loader-runner/lib/LoaderRunner.js:205:4)
[vueserver]     at Storage.finished (/Users/ar/Temp/holpy/app/node_modules/enhanced-resolve/lib/CachedInputFileSystem.js:55:16)
[vueserver]     at /Users/ar/Temp/holpy/app/node_modules/enhanced-resolve/lib/CachedInputFileSystem.js:91:9
[vueserver] node:internal/crypto/hash:69
[vueserver]   this[kHandle] = new _Hash(algorithm, xofLen);
[vueserver]                   ^
[vueserver]
[vueserver] Error: error:0308010C:digital envelope routines::unsupported
[vueserver]     at new Hash (node:internal/crypto/hash:69:19)
[vueserver]     at Object.createHash (node:crypto:138:10)
[vueserver]     at module.exports (/Users/ar/Temp/holpy/app/node_modules/webpack/lib/util/createHash.js:135:53)
[vueserver]     at NormalModule._initBuildHash (/Users/ar/Temp/holpy/app/node_modules/webpack/lib/NormalModule.js:417:16)
[vueserver]     at handleParseError (/Users/ar/Temp/holpy/app/node_modules/webpack/lib/NormalModule.js:471:10)
[vueserver]     at /Users/ar/Temp/holpy/app/node_modules/webpack/lib/NormalModule.js:503:5
[vueserver]     at /Users/ar/Temp/holpy/app/node_modules/webpack/lib/NormalModule.js:358:12
[vueserver]     at /Users/ar/Temp/holpy/app/node_modules/loader-runner/lib/LoaderRunner.js:373:3
[vueserver]     at iterateNormalLoaders (/Users/ar/Temp/holpy/app/node_modules/loader-runner/lib/LoaderRunner.js:214:10)
[vueserver]     at Array.<anonymous> (/Users/ar/Temp/holpy/app/node_modules/loader-runner/lib/LoaderRunner.js:205:4)
[vueserver]     at Storage.finished (/Users/ar/Temp/holpy/app/node_modules/enhanced-resolve/lib/CachedInputFileSystem.js:55:16)
[vueserver]     at /Users/ar/Temp/holpy/app/node_modules/enhanced-resolve/lib/CachedInputFileSystem.js:91:9
[vueserver]     at /Users/ar/Temp/holpy/app/node_modules/graceful-fs/graceful-fs.js:123:16
[vueserver]     at FSReqCallback.readFileAfterClose [as oncomplete] (node:internal/fs/read/context:68:3) {
[vueserver]   opensslErrorStack: [ 'error:03000086:digital envelope routines::initialization error' ],
[vueserver]   library: 'digital envelope routines',
[vueserver]   reason: 'unsupported',
[vueserver]   code: 'ERR_OSSL_EVP_UNSUPPORTED'
[vueserver] }
[vueserver]
[vueserver] Node.js v20.5.0
[vueserver] vue-cli-service serve exited with code 1

```

Bohua Zhan/holpy

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