fork: Resource temporarily unavailable

[dmd]

I am getting:

/bin/sh: fork: Resource temporarily unavailable
Error: Command failed: wget --help | grep "content-on-error" || true
/bin/sh: fork: Resource temporarily unavailable

    at genericNodeError (node:internal/errors:956:15)
    at wrappedFn (node:internal/errors:510:14)
    at checkExecSyncError (node:child_process:890:11)
    at execSync (node:child_process:962:15)
    at contentOnError (/Users/dmd/ghost-static-site-generator/src/helpers/crawlPageAsyncHelper/crawlPageAsyncHelper.js:6:34)
    at crawlPageAsyncHelper (/Users/dmd/ghost-static-site-generator/src/helpers/crawlPageAsyncHelper/crawlPageAsyncHelper.js:36:57)
    at /Users/dmd/ghost-static-site-generator/src/helpers/responsiveImagesHelper/responsiveImagesHelper.js:67:5
    at Array.forEach (<anonymous>)
    at responsiveImagesHelper (/Users/dmd/ghost-static-site-generator/src/helpers/responsiveImagesHelper/responsiveImagesHelper.js:61:12)
    at generateStaticSite (/Users/dmd/ghost-static-site-generator/src/commands/generateStaticSite.js:52:5) {
  status: 128,
  signal: null,
  output: [
    null,
    <Buffer >,
    <Buffer 2f 62 69 6e 2f 73 68 3a 20 66 6f 72 6b 3a 20 52 65 73 6f 75 72 63 65 20 74 65 6d 70 6f 72 61 72 69 6c 79 20 75 6e 61 76 61 69 6c 61 62 6c 65 0a>
  ],
  pid: 90699,
  stdout: <Buffer >,
  stderr: <Buffer 2f 62 69 6e 2f 73 68 3a 20 66 6f 72 6b 3a 20 52 65 73 6f 75 72 63 65 20 74 65 6d 70 6f 72 61 72 69 6c 79 20 75 6e 61 76 61 69 6c 61 62 6c 65 0a>
}