Crash report: `Error: No V2 factory address on this chain`

URL

https://app.uniswap.org/#/pool/v2

Error

Error: No V2 factory address on this chain

Stacktrace

Error: No V2 factory address on this chain
    at F (https://app.uniswap.org/static/js/main.8d18ce4a.chunk.js:1:314793)
    at https://app.uniswap.org/static/js/main.8d18ce4a.chunk.js:1:706821
    at Array.map (<anonymous>)
    at https://app.uniswap.org/static/js/main.8d18ce4a.chunk.js:1:706771
    at Object.useMemo (https://app.uniswap.org/static/js/3.10dd3680.chunk.js:2:3039327)
    at https://app.uniswap.org/static/js/3.10dd3680.chunk.js:2:2942127
    at Pj (https://app.uniswap.org/static/js/main.8d18ce4a.chunk.js:1:706749)
    at oi (https://app.uniswap.org/static/js/3.10dd3680.chunk.js:2:3033362)
    at Xo (https://app.uniswap.org/static/js/3.10dd3680.chunk.js:2:3085662)
    at Fu (https://app.uniswap.org/static/js/3.10dd3680.chunk.js:2:3072903)

Device data

{
  "ua": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36 Edg/99.0.1150.39",
  "browser": {
    "name": "Edge",
    "version": "99.0.1150.39",
    "major": "99"
  },
  "engine": {
    "name": "Blink",
    "version": "99.0.4844.51"
  },
  "os": {
    "name": "Windows",
    "version": "10"
  },
  "device": {},
  "cpu": {
    "architecture": "amd64"
  }
}

Reproduce the crash at https://app.uniswap.org/#/pool/v2 and inspect the V2 pool route corresponding to the reported main.8d18ce4a.chunk.js stack trace. Trace why the V2 factory address is missing for the active chain; done means the route no longer crashes and the relevant behavior is covered by the project's existing checks.