Include your name/company, contact details, affected service/system, what happened, when it started, business impact, affected users, exact errors, recent changes and safe screenshots.
What to do next
If this answer does not fully match your situation, do not guess on a production, security, payment or data-related change. Contact DAIM HUB with the affected service, what happened, when it started, business impact and any safe screenshots or error messages.
Help Centre content is general guidance. Your final signed project Scope of Work and agreed terms and conditions take priority where they differ from a Help Centre answer.
