I'm getting this strange error since yesterday:

[INFO] --- site-maven-plugin:0.9:site (default) @ thindeck ---
[INFO] Creating 266 blobs
[INFO] Creating tree with 266 blob entries
[INFO] Merging with tree 38ea39dde5d53409ee335d390037329d0bf09a58
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 04:01 min
[INFO] Finished at: 2014-08-29T19:49:08+00:00
[INFO] Final Memory: 59M/489M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.github.github:site-maven-plugin:0.9:site (default) on project thindeck: Error creating commit: Invalid request.
[ERROR]
[ERROR] Expected data to be of type "object"; value was: nil.
[ERROR] Expected data to be of type "object"; value was: nil. (422)
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal com.github.github:site-maven-plugin:0.9:site (default) on project thindeck: Error creating commit: Invalid request.

Expected data to be of type "object"; value was: nil.
Expected data to be of type "object"; value was: nil. (422)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:216)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:347)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:154)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:213)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:157)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.MojoExecutionException: Error creating commit: Invalid request.

Expected data to be of type "object"; value was: nil.
Expected data to be of type "object"; value was: nil. (422)
    at com.github.maven.plugins.site.SiteMojo.execute(SiteMojo.java:440)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
    ... 19 more
Caused by: org.eclipse.egit.github.core.client.RequestException: Invalid request.

Expected data to be of type "object"; value was: nil.
Expected data to be of type "object"; value was: nil. (422)
    at org.eclipse.egit.github.core.client.GitHubClient.createException(GitHubClient.java:552)
    at org.eclipse.egit.github.core.client.GitHubClient.sendJson(GitHubClient.java:643)
    at org.eclipse.egit.github.core.client.GitHubClient.post(GitHubClient.java:757)
    at org.eclipse.egit.github.core.service.DataService.createCommit(DataService.java:397)
    at com.github.maven.plugins.site.SiteMojo.execute(SiteMojo.java:434)
    ... 21 more
[ERROR]
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

Full log is here, if necessary: http://www.rultor.com/t/722-53921097