Failed to connect to MQTT, API Key not found: API key not found

The error indicates that I’m missing an MQTT API key, I’ve check that there’s an key and on multiple occasions retreated a key but continually I’m getting the following error when monitoring the Applications Live Data

{
“name”: “as.mqtt.connect.fail”,
“time”: “2022-07-18T15:38:28.158754775Z”,
“identifiers”: [
{
“application_ids”: {
“application_id”: “rat-trap”
}
}
],
“data”: {
@type”: “type.googleapis.com/ttn.lorawan.v3.ErrorDetails”,
“namespace”: “pkg/identityserver”,
“name”: “api_key_not_found”,
“message_format”: “API key not found”,
“correlation_id”: “6e9c8bce81b34ec089c16a3ccbcb5227”,
“cause”: {
“namespace”: “pkg/identityserver/gormstore”,
“name”: “api_key_not_found”,
“message_format”: “API key not found”,
“correlation_id”: “b908cf6cd54c41c8b9f086ed5d930895”,
“code”: 5
},
“code”: 16
},
“origin”: “ip-10-100-6-190.eu-west-1.compute.internal”,
“context”: {
“tenant-id”: “CgN0dG4=”
},
“visibility”: {
“rights”: [
“RIGHT_APPLICATION_TRAFFIC_READ”
]
},
“unique_id”: “01G88ZBXDY77ZBN4MVKFNNB3WX”

I’m attempting to connect my own MQTT bridge to the TTN MQTT bridge, but even when my Mosquitto service is stopped the errors continue, as a result assuming the error is within my TTN Application

Have you looked in the Console - Specific Application for this API key - Live data when this failure occurs? Are there any messages that might give you a hint?