Addon Compatibility Issue

I have uploaded a new version of an addon, but the listing shows that it is not compatible with Firefox 48.

My manifest.json file has always had something like the following:

"applications": {
    "gecko": {
        "id": "…",
        "strict_min_version": "48.0",
        "strict_max_version": "50.*"
    }
},

but I get the message:

Not available for Firefox 48.0

How do I make sure that it is compatible?

Is there any reason you set the strict_max_version? Generally you should avoid it.

What’s your add-on listing?