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The idea for rosbag2 is that you don't load the concrete db3 file, but specify the folder where your data is located.
Can you try to run
ros2 bag play rosbag2_2019_01_22-17_57_14
I believe this should help.
To give you a bit of background: The file you specified is then getting interpreted as the folder name and within rosbag2 looks for a metdata file telling how to interpret this data. Obviously, this metadata file is not found. I believe though the error messages are misleading. I think it makes sense to check whether the given file is indeed a directory or not and present the error message accordingly. Feel free to open a ticket for this here: https://github.com/ros2/rosbag2
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