I have a NextJS site running in an Azure Web App. It spams this error message to the terminal every 3 seconds or so:

TypeError: result.pipeToNodeResponse is not a function
    at Object.sendRenderResult (/home/site/wwwroot/node_modules/next/dist/server/send-payload.js:118:18)
    at NextNodeServer.sendRenderResult (/home/site/wwwroot/node_modules/next/dist/server/next-server.js:368:34)
    at NextNodeServer.pipe (/home/site/wwwroot/node_modules/next/dist/server/base-server.js:380:25)
    at async Object.fn (/home/site/wwwroot/node_modules/next/dist/server/next-server.js:727:21)
    at async Router.execute (/home/site/wwwroot/node_modules/next/dist/server/router.js:247:36)
    at async NextNodeServer.run (/home/site/wwwroot/node_modules/next/dist/server/base-server.js:346:29)
    at async NextNodeServer.handleRequest (/home/site/wwwroot/node_modules/next/dist/server/base-server.js:284:20)

I tried looking through the NextJS source code but wasn’t able to track down a cause for this issue. The site itself returns a 500 if you try to visit it.

Info:

Node: 18 LTS
Next: 12.3.0

What might cause such an error?