Game crashing when start the minecraft; realms module missing

Thank you for your report!
However, this issue has been temporarily closed as Awaiting Response.

We do not have enough information to find the cause of this issue.
Please attach the crash report found in [.minecraft|http://hopper.minecraft.net/help/guides/finding-minecraft-data-folder]/crash-reports/crash-<DATE>-client.txt here.

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If you don't have a current crash report, please attach the launcher log which is located at [.minecraft|http://hopper.minecraft.net/help/guides/finding-minecraft-data-folder]/launcher_log.txt.

Once you have attached the crash report or the launcher log, the report will be reopened automatically.

Apart from that, only one issue per report please. Also Realms only works on releases, not in snapshots.

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That was an error. I only see this, and the game don't showed this crash report in .minecraft-->crash-reports. So the game started when start, in this snapshots.I will try to update the Java for better chances.

Oh right.
This appears to be an issue in the snapshots indeed. This means that the realms library fails to load. See MC-121287, where this issue has already been reported before.