Hello, I run a standard Nginx reverse proxy with instructions from one of the official tutorials with DigitalOcean. In the past few weeks, I started to notice (and others, too) random “Cannot Load App” messages when visiting the forum. Just randomly and semi-rarely. Refreshing with F5 instantly shows the site again. Anyone have any clues? [image] https://forum.imperium42.com EDIT: Plugins – [image]

I have the same issue, that always happens when I closed the browser with tabs saved and re open it. Than I get that messege and I need to refresh the page.

Are you starting to have more traffic? I’ve seen this most often when the server isn’t able to keep up.

I think the message that we send when fetch throws an error is confusing. fetch(event.request).catch(function(error) { // The catch is only triggered if fetch() throws an exception, which will most likely // happen due to the server being unreachable. // If fetch() returns a valid HTTP response with an response code in the 4xx or 5xx // range, the catch() will NOT be called. If you need custom handling for 4xx or 5xx // errors, see https://github.com/GoogleChrome/samples/tree/gh-pages/service-worker/fallback-response return caches.match(OFFLINE_URL); If the server is unreachable, it doesn’t mean that the client is offline and I think this is why a lot of people are getting confused.

What do you suggest as the alternate text? Can we even control the text the browser shows in this scenario?

Had this happen to us this morning. I rebooted our droplet (digital ocean hosted) and it seemed to resolve the issue.

[image] Daniel_Nevoigt: I have the same issue, that always happens when I closed the browser with tabs saved and re open it. Than I get that messege and I need to refresh the page. This is a bug in Firefox Session Restore feature active in version 59. Right now I can’t repro this in Firefox 60 beta so I’m assuming they fixed it already. [image] dylanh724: In the past few weeks, I started to notice (and others, too) random “Cannot Load App” messages when visiting the forum. Just randomly and semi-rarely. Refreshing with F5 instantly shows the site again. Like @pfaffman said this can be a server problem or anything in between (like you being in a flaky connection). [image] Define_Logan: Had this happen to us this morning. I rebooted our droplet (digital ocean hosted) and it seemed to resolve the issue. Yes, if your server goes down you can see this message too.

[image] Falco: This is a bug in Firefox Session Restore feature active in version 59. Right now I can’t repro this in Firefox 60 beta so I’m assuming they fixed it already. Thanks a lot for the Info

FWIW: Seeing this issue on Firefox Nightly 61. Just went to the Letsencrypt Forum … Cannot load app … Then went here to report … Cannot load app. It’s frustrating :frowning:

"Cannot Load App".... in Firefox sometimes. Refresh fixes it

Product Support

Falco (Falco) April 17, 2018, 4:27pm 15

Firefox team confirms it’s fixed in Firefox for next release:

"Cannot load app" error when pressing the back button on Firefox

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"Cannot Load App".... in Firefox sometimes. Refresh fixes it

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