The error is No recommendation found for page, suggesting this is an issue with the image suggestions API (or the communication between the API and the extension). Could be beta-specific.

Other beta wikis also fail but with Thumbnailing error.

In T300822#7673709, @Tgr wrote:

The error is No recommendation found for page, suggesting this is an issue with the image suggestions API (or the communication between the API and the extension). Could be beta-specific.

Yes, it is beta-specific. But that prevents from all image recommendation testing.

Whatever thumbnailing problem beta had seems fixed now (probably T300751: InstantCommons is broken ). There is a new problem though: the task API doesn't return any returns, so only the first image (which is pre-rendered on the server side) is available. Not sure if that's beta-specific (can't reproduce it on testwiki, at least). Also, seems to affect some beta wikis only (cs but not en).

In T300822#7673709, @Tgr wrote:

The error is No recommendation found for page, suggesting this is an issue with the image suggestions API (or the communication between the API and the extension). Could be beta-specific.

Beta enwiki suggested tasks genuinely don't have recommendations. Presumably all the articles we have imported last autumn already have images on production enwiki; we would have to import test tasks again.

In T300822#7694753, @Tgr wrote:

There is a new problem though: the task API doesn't return any returns, so only the first image (which is pre-rendered on the server side) is available.

E.g. https://cs.wikipedia.beta.wmflabs.org/w/api.php?action=query&format=jsonfm&list=growthtasks&gtlimit=20&gttasktypes=image-recommendation&formatversion=2&uselang=en

{
    "batchcomplete": true,
    "continue": {
        "gtoffset": 1,
        "continue": "-||"
    },
    "query": {
        "growthtasks": {
            "totalCount": 427,
            "qualityGateConfig": {
                "image-recommendation": {
                    "dailyLimit": false,
                    "dailyCount": 0
                }
            },
            "suggestions": []
        }
    }
}

somehow query continuation is triggered. Can't reliably reproduce though.

...or rather, can't reproduce at all anymore. I don't see any recent merges that would explain this, either. The behavior was consistent with $wgAPIMaxResultSize being very small (and so $fits always being false in ApiQueryGrowthTasks::execute()) so maybe someone was live-debugging? Or just mystical beta brokenness, which is unfortunately not all that rare.

In any case, all the issues here have fixed themselves, I think. @Etonkovidova can you confirm? Also, do you need a new batch of tasks imported to beta enwiki?

In T300822#7695060, @Tgr wrote:

...or rather, can't reproduce at all anymore. I don't see any recent merges that would explain this, either. The behavior was consistent with $wgAPIMaxResultSize being very small (and so $fits always being false in ApiQueryGrowthTasks::execute()) so maybe someone was live-debugging? Or just mystical beta brokenness, which is unfortunately not all that rare.

In any case, all the issues here have fixed themselves, I think. @Etonkovidova can you confirm? Also, do you need a new batch of tasks imported to beta enwiki?

@Tgr cswiki betalabs has Add image tasks (the count is 290) and it works (no "Suggestions are no longer available on this article" message). enwiki betalabs still has old Add image tasks (the count is 39) - the warning "Suggestions are no longer available ..." will be displayed.