Custom Event Trigger activation failed in Synapse

Question

I have created pipeline with 2 parameters in Synapse and added Custom event trigger. I published it successfully. Then I activate it (switch to start status) and publish but get an error: "Failed to activate my_trigger. The "view details" link doesn’t open, so I don’t see the details. The problem occurred on 18/10/2023. Before this everything worked correctly.
json of my trigger:

{
    "name": "TRG_UC3",
    "properties": {
        "annotations": [],
        "runtimeState": "Stopped",
        "pipelines": [
            {
                "pipelineReference": {
                    "referenceName": "PL_ADLS_Bronze_to_ADLS_Silver_tmdb",
                    "type": "PipelineReference"
                },
                "parameters": {
                    "trending_filename": "@TriggerBody.Event.data.trending_filename",
                    "genres_filename": "@TriggerBody.Event.data.genres_filename"
                }
            }
        ],
        "type": "CustomEventsTrigger",
        "typeProperties": {
            "subjectEndsWith": "",
            "subjectBeginsWith": "tmdb",
            "scope": "/subscriptions/*****/resourceGroups/*****/providers/Microsoft.EventGrid/topics/evgt-di-mentoring-tb",
            "events": [
                "copycompleted"
            ]
        }
    }
}