Simplify the following Kubernetes error message delimited by triple dashes written in --- english --- language; --- Back-off pulling image "ngngngn:latest" ---.
        Provide the most possible solution in a step by step style in no more than 280 characters. Write the output in the following format:
        Error: {Explain error here}
        Solution: {Step by step solution here} In your response, capitalize a few words to stress main points. Please limit the number of words with all capital letters to less than 3.
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