Crash report: `Error: Unsupported chain ID`

URL

https://app.uniswap.org/#/pool/81544?chain=arbitrum

Error

Error: Unsupported chain ID

Stacktrace

Error: Unsupported chain ID
    at n.get (https://app.uniswap.org/static/js/main.cd4bff96.chunk.js:1:560338)
    at Xh (https://app.uniswap.org/static/js/main.cd4bff96.chunk.js:1:415548)
    at ka (https://app.uniswap.org/static/js/2.20ac698b.chunk.js:2:2756012)
    at Oo (https://app.uniswap.org/static/js/2.20ac698b.chunk.js:2:2767700)
    at ks (https://app.uniswap.org/static/js/2.20ac698b.chunk.js:2:2814107)
    at gu (https://app.uniswap.org/static/js/2.20ac698b.chunk.js:2:2802160)
    at mu (https://app.uniswap.org/static/js/2.20ac698b.chunk.js:2:2802088)
    at yu (https://app.uniswap.org/static/js/2.20ac698b.chunk.js:2:2801951)
    at iu (https://app.uniswap.org/static/js/2.20ac698b.chunk.js:2:2798731)
    at su (https://app.uniswap.org/static/js/2.20ac698b.chunk.js:2:2799122)

Device data

{
  "ua": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.134 Safari/537.36",
  "browser": {
    "name": "Chrome",
    "version": "103.0.5060.134",
    "major": "103"
  },
  "engine": {
    "name": "Blink",
    "version": "103.0.5060.134"
  },
  "os": {
    "name": "Mac OS",
    "version": "10.15.7"
  },
  "device": {},
  "cpu": {}
}

Start by opening the reported pool URL with chain=arbitrum and reproducing the Unsupported chain ID crash. Use the provided stacktrace as the initial trace into the application source; no source file or test is named. Done means the URL loads without this error and the relevant regression is covered by an appropriate test.