Guidance: Employer PAYE: service availability and issues.
HMRC provides a dedicated webpage to report current service availability and any technical issues affecting the Employer PAYE service. This information is relevant to all employers who use the online system to manage their PAYE obligations. You should check this page if you are experiencing difficulties accessing the service or if you need to confirm whether HMRC is aware of ongoing system outages.
Source: https://www.gov.uk/government/publications/epaye-service-availability-and-issues. Summarised automatically from the official source — general information, not advice.