Unknown Error occurred during attempt to update cache Error

Hi there,

Recently I install a new self hosted server, but this service have the following error:

Unknown Error occurred during attempt to update cache Error: Request to https://host/user/formList?formID=aySdw3RbLcusvvVn3kQ3gt failed.
 at Request._callback (/srv/src/enketo_express/app/lib/communicator/communicator.js:271:25)
 at Request.self.callback (/srv/src/enketo_express/node_modules/request/request.js:185:22)
 at Request.emit (events.js:314:20)
 at Request.<anonymous> (/srv/src/enketo_express/node_modules/request/request.js:1154:10)
 at Request.emit (events.js:314:20)
 at IncomingMessage.<anonymous> (/srv/src/enketo_express/node_modules/request/request.js:1076:12)
 at Object.onceWrapper (events.js:420:28)
 at IncomingMessage.emit (events.js:326:22)
 at endReadableNT (_stream_readable.js:1241:12)
 at processTicksAndRejections (internal/process/task_queues.js:84:21) {
  status: 502
 }

I try run the setup twice but the error return in a few hours…

Maybe someone have any idea to solve this problem?

Thanks.

Thank you for sharing the solution with the entire community, @finlay!

The issue return!! and now happen in intervals of one or two hours.

The environment is:

Ubuntu server 20.04
Installed by latest kobo-install

Regards.