We have identified a problem with security groups.
Symptoms: Saving the security groups returns an error.
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08.07.19 0936Z (1136LT)
The problem is now solved, the situation is back to normal.
08.07.19 0925Z (1125LT)
The product team has identified the root cause and working on a fix
08.07.19 0911Z (1111LT)
Issue has been escalated to local team