Troubleshooting error from I18N system

Hi,

I need some help troubleshooting a pretty strange phenomonen that just appeared while working. The project went from a state of working to this odd state described below - without me doing any changes. No changes recorderd since the previous checkpoint.

I have this world with hotspots by the yellow plus symbols. They used to be accompanied by blue title textboxes, like so:

All of a sudden they all just stopped showing. They do not show in the editor and not in launched mode. I see no error messages in the console, unless I turn on debug mode and then I see this error:


[playcanvas-1.73.4.dbg.js:69804]: pc.I18n#addData: Invalid "header.version" field

Error: pc.I18n#addData: Invalid "header.version" field
    at I18nParser._validate (https://code.playcanvas.com/playcanvas-1.73.4.dbg.js:69804:14)
    at I18nParser.parse (https://code.playcanvas.com/playcanvas-1.73.4.dbg.js:69828:11)
    at I18n.addData (https://code.playcanvas.com/playcanvas-1.73.4.dbg.js:70029:30)
    at I18n._onAssetChange (https://code.playcanvas.com/playcanvas-1.73.4.dbg.js:70132:13)
    at Asset.fire (https://code.playcanvas.com/playcanvas-1.73.4.dbg.js:1668:21)
    at Asset.set (https://code.playcanvas.com/playcanvas-1.73.4.dbg.js:67428:13)
    at _opened (https://code.playcanvas.com/playcanvas-1.73.4.dbg.js:67942:25)
    at Array._loaded (https://code.playcanvas.com/playcanvas-1.73.4.dbg.js:67988:10)
    at ResourceLoader._onSuccess (https://code.playcanvas.com/playcanvas-1.73.4.dbg.js:69679:30)
    at https://code.playcanvas.com/playcanvas-1.73.4.dbg.js:69616:19

Update: They now show, but with no fetched I18N data. Did anything change in the I18N system recently?

Now when I reload it seems every second time it works and it doesn’t.
The header.version field mentioned in the error msg is defined like this in my language files:

{
    "header": {
        "version": 4
    },
    "data": [
        {
            "info": {
                "locale": "en-US"
            },
            "messages": {
                "contact.us": "Contact us",
                "read.more": "Read more",
                "link1title": "Product page",
                "link2title": "Learn more",
                "link3title": "Read a customer story",
                "link4title": "Watch a video",
...

As of today this problem has disappeared. I have not made any changes.

Is the localization system dependent on some external service/server that might have had some downtime?

I should mention this error is not gone, it’s just that i only appears sometimes. Often a simple reload is enough to get it going again.