Bonjour ,

Mon minecraft ne veux plus s'ouvrir.Quand je l'ouvre il met ceci :

Bootstrap (v5)
Current time is Oct 24, 2016, 12:04:55 PM
System.getProperty('os.name') == 'Linux'
System.getProperty('os.version') == '4.4.0-45-generic'
System.getProperty('os.arch') == 'amd64'
System.getProperty('java.version') == '9-ea'
System.getProperty('java.vendor') == 'Oracle Corporation'
System.getProperty('sun.arch.data.model') == '64'

FATAL ERROR: java.lang.ExceptionInInitializerError
	at javax.crypto.JceSecurityManager.<clinit>(java.base@9-ea/JceSecurityManager.java:65)
	at javax.crypto.Cipher.getConfiguredPermission(java.base@9-ea/Cipher.java:2595)
	at javax.crypto.Cipher.getMaxAllowedKeyLength(java.base@9-ea/Cipher.java:2619)
	at sun.security.ssl.CipherSuite$BulkCipher.isUnlimited(java.base@9-ea/CipherSuite.java:602)
	at sun.security.ssl.CipherSuite$BulkCipher.<init>(java.base@9-ea/CipherSuite.java:574)
	at sun.security.ssl.CipherSuite$BulkCipher.<clinit>(java.base@9-ea/CipherSuite.java:460)
	at sun.security.ssl.CipherSuite.<clinit>(java.base@9-ea/CipherSuite.java:1074)
	at sun.security.ssl.SSLContextImpl.getApplicableSupportedCipherSuiteList(java.base@9-ea/SSLContextImpl.java:353)
	at sun.security.ssl.SSLContextImpl.access$100(java.base@9-ea/SSLContextImpl.java:41)
	at sun.security.ssl.SSLContextImpl$AbstractTLSContext.<clinit>(java.base@9-ea/SSLContextImpl.java:582)
	at java.lang.Class.forName0(java.base@9-ea/Native Method)
	at java.lang.Class.forName(java.base@9-ea/Class.java:291)
	at java.security.Provider$Service.getImplClass(java.base@9-ea/Provider.java:1844)
	at java.security.Provider$Service.newInstance(java.base@9-ea/Provider.java:1820)
	at sun.security.jca.GetInstance.getInstance(java.base@9-ea/GetInstance.java:236)
	at sun.security.jca.GetInstance.getInstance(java.base@9-ea/GetInstance.java:164)
	at javax.net.ssl.SSLContext.getInstance(java.base@9-ea/SSLContext.java:166)
	at javax.net.ssl.SSLContext.getDefault(java.base@9-ea/SSLContext.java:98)
	at javax.net.ssl.SSLSocketFactory.getDefault(java.base@9-ea/SSLSocketFactory.java:123)
	at javax.net.ssl.HttpsURLConnection.getDefaultSSLSocketFactory(java.base@9-ea/HttpsURLConnection.java:332)
	at javax.net.ssl.HttpsURLConnection.<init>(java.base@9-ea/HttpsURLConnection.java:289)
	at sun.net.www.protocol.https.HttpsURLConnectionImpl.<init>(java.base@9-ea/HttpsURLConnectionImpl.java:85)
	at sun.net.www.protocol.https.Handler.openConnection(java.base@9-ea/Handler.java:62)
	at java.net.URL.openConnection(java.base@9-ea/URL.java:1098)
	at net.minecraft.bootstrap.Downloader.getConnection(Downloader.java:151)
	at net.minecraft.bootstrap.Downloader.run(Downloader.java:46)
	at net.minecraft.bootstrap.Bootstrap.execute(Bootstrap.java:92)
	at net.minecraft.bootstrap.Bootstrap.main(Bootstrap.java:381)
Caused by: java.lang.SecurityException: Can not initialize cryptographic mechanism
	at javax.crypto.JceSecurity.<clinit>(java.base@9-ea/JceSecurity.java:91)
	... 28 more
Caused by: java.lang.NullPointerException
	at sun.nio.fs.UnixPath.normalizeAndCheck(java.base@9-ea/UnixPath.java:75)
	at sun.nio.fs.UnixPath.<init>(java.base@9-ea/UnixPath.java:69)
	at sun.nio.fs.UnixFileSystem.getPath(java.base@9-ea/UnixFileSystem.java:280)
	at java.nio.file.Paths.get(java.base@9-ea/Paths.java:84)
	at javax.crypto.JceSecurity.setupJurisdictionPolicies(java.base@9-ea/JceSecurity.java:254)
	at javax.crypto.JceSecurity.access$000(java.base@9-ea/JceSecurity.java:49)
	at javax.crypto.JceSecurity$1.run(java.base@9-ea/JceSecurity.java:82)
	at javax.crypto.JceSecurity$1.run(java.base@9-ea/JceSecurity.java:79)
	at java.security.AccessController.doPrivileged(java.base@9-ea/Native Method)
	at javax.crypto.JceSecurity.<clinit>(java.base@9-ea/JceSecurity.java:78)
	... 28 more


Please fix the error and restart.

Pour ce problème là je suis allée chercher sur internet et j'ai trouvé que les gens avaient des points d'exclamations dans leurs noms ce qui causait ce problème mais moi je n'en ai pas .
Si quelqu'un peut m'aider ,

Merci d'avance