Error: Update check failed. The server sent an invalid response. Try again later.

[setchy]

I have two electron apps that recently have started failing when checking for automated updates for macOS.

Both use electron-builder to package releases.

gitify-app/gitify

For gitify, only a universal macOS build is published.

[2024-10-06 15:20:17.427] [info]  feedURL https://update.electronjs.org/gitify-app/gitify/darwin-arm64/5.15.0
[2024-10-06 15:20:17.429] [info]  requestHeaders { 'User-Agent': 'update-electron-app/3.0.0 (darwin: arm64)' }
[2024-10-06 15:20:17.452] [info]  checking-for-update
[2024-10-06 15:20:17.653] [error] Auto Updater: error checking for update Error: Update check failed. The server sent an invalid response. Try again later.
[2024-10-06 15:20:17.653] [info]  updater error
[2024-10-06 15:20:17.654] [info]  Error: Update check failed. The server sent an invalid response. Try again later.

setchy/atlassify

For atlassify, a combination of universal, arm64 and x64 macOS builds are published

[2024-10-06 15:17:20.060] [info]  feedURL https://update.electronjs.org/setchy/atlassify/darwin-arm64/1.4.0
[2024-10-06 15:17:20.062] [info]  requestHeaders { 'User-Agent': 'update-electron-app/3.0.0 (darwin: arm64)' }
[2024-10-06 15:17:20.077] [info]  checking-for-update
[2024-10-06 15:17:20.287] [error] Auto Updater: error checking for update Error: Update check failed. The server sent an invalid response. Try again later.
[2024-10-06 15:17:20.288] [info]  updater error
[2024-10-06 15:17:20.288] [info]  Error: Update check failed. The server sent an invalid response. Try again later.