Problem: Jira Intragation in GitLab

Hello!
I use the Jira Integration mostly to send commit mesages to Jira Tickets and from the day to night it stops to work.

I reconfigured everything on my Jira and GitLab following GitLab’s Documentation but got no success on solving the poblem.

The error message I get is as follows:
{
“severity”:“ERROR”
“time”:“2019-06-18T13:50:58.347Z”
“correlation_id”:“d66cb62a-5877-4b97-a013-cf95317ec887”
“service_class”:“JiraService”
“project_id”:472
“project_path”:“project_path”
“message”:“Error sending message”
“client_url”:“https://mycloud.atlassian.net/”
“error”:""
}

Did anyone know how to fix this random problem?
Is it releated with the recent Jira APIs update?

just set up a new server instance and got stuck with the same error. Gitlab references the Jira issues correctly (applies direct links to the mentioning) but does not apply any change to the jira issues itself.

edit//

try to check your permissions by using the api through curl, as shown here:

debugging the permissions, resolved my problem.