Standing trial in a dream is read as self-judgement — weighing your own choices in front of an inner court. It often appears when you feel your actions are being examined by others.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.