as you might know, there is no support available from ServiceNow in relation to PDIs, hence you’re limited to two options:
wait, it should come online again after some time.
If you get tired of waiting. Release your instance and request a fresh installation. Note! Any work that hasn’t been backed up will be list for good.
If my answer has helped with your question, please mark my answer as the accepted solution and give a thumbs up.
