Steps to reproduce:

**Make any valid template. Here's a super-simple TEST:

{{{{ "zabbix_export": { "groups": [

],  "templates": [ { "groups": [

],  "name": "TEST",  "template": "TEST",  "uuid": "e4ad7acc1a804011b7b8161663e1f31b" } ],  "version": "5.4" }}}}

++Import (in my case with Ansible) - I am NOT using the zabbix_template module which right now seems to be broken with 5.4, because they are still trying to set "applications"

Ansible task for reference:

 and template.import.test.json.j2 contents:

{
    "jsonrpc": "2.0",
    "method": "configuration.import",
    "params": {
        "format": "xml",
        "rules": {
            "valueMaps": {
                "createMissing": true,
                "updateExisting": false
            },
            "hosts": {
                "createMissing": true,
                "updateExisting": true
            },
            "items": {
                "createMissing": true,
                "updateExisting": true,
                "deleteMissing": true
            }
        },
        "source": "<zabbix_export><version>5.4</version><groups><group><uuid>f2481361f99448eea617b7b1d4765566</uuid><name>Discovered hosts</name></group></groups><templates><template><uuid>62925bc2fc844fa6a531cbb6d5515d65</uuid><template>TEST</template><name>TEST</name><groups><group><name>Discovered hosts</name></group></groups></template></templates></zabbix_export>"
    },
    "auth": "{{ auth_token }}",
    "id": 1
}

Result:

SEEMS successful:

Full Ansible task output:

However, no template was imported. This is best reflected in the DB:

But of course you can see this in the GUI by the lack of the "TEST" template:

Expected:
I expect it to create the row for the template in the hosts table, and to show up in the GUI list.

NOTES:

• Import works using the same json if performed via the GUI. The problem is only encountered with API.
• I'm showing a very simple one but you can test with any template.