Installed Umbraco version 7.11.1 via nuget in Visual Studio. Its using SQL Server CE. Im getting constant database errors. Sometimes it tells me that there is a sharing violation.

Some of the errors from the log file are:

2018-07-04 11:02:38,137 [P9980/D2/T14] INFO Umbraco.Web.Install.Controllers.InstallApiController - Executing installation step: User 2018-07-04 11:02:38,139 [P9980/D2/T14] ERROR Umbraco.Web.Install.Controllers.InstallApiController - Installation step User failed. System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ArgumentNullException: Value cannot be null. Parameter name: sqlSyntax at Umbraco.Core.Persistence.Repositories.PetaPocoRepositoryBase`2..ctor(IScopeUnitOfWork work, CacheHelper cache, ILogger logger, ISqlSyntaxProvider sqlSyntax) at Umbraco.Core.Persistence.RepositoryFactory.CreateUserRepository(IScopeUnitOfWork uow) at Umbraco.Core.Services.UserService.GetUserById(Int32 id) at Umbraco.Web.Install.InstallSteps.NewInstallStep.Execute(UserModel user) --- End of inner exception stack trace --- at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at Umbraco.Web.Install.Controllers.InstallApiController.ExecuteStep(InstallSetupStep step, JToken instruction) 2018-07-04 11:02:38,139 [P9980/D2/T14] INFO Umbraco.Web.Install.Controllers.InstallApiController - Step completed (took 2ms) 2018-07-04 11:02:38,140 [P9980/D2/T14] ERROR Umbraco.Web.Install.Controllers.InstallApiController - An error occurred during installation step User System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ArgumentNullException: Value cannot be null. Parameter name: sqlSyntax

2018-07-04 11:36:08,294 [P9980/D2/T30] WARN Umbraco.Core.Persistence.DbConnectionExtensions - Configured database is reporting as not being available! DataSource: DARKRASFCAB, InitialCatalog: umbraco7_1. Exception: System.Data.SqlClient.SqlException (0x80131904): Login failed for user 'umbraco'. at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, DbConnectionPool pool, String accessToken, Boolean applyTransientFaultHandling, SqlAuthenticationProviderManager sqlAuthProviderManager) at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions) at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource1 retry, DbConnectionOptions userOptions) at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource1 retry, DbConnectionOptions userOptions) at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource1 retry) at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource1 retry) at System.Data.SqlClient.SqlConnection.Open() at Umbraco.Core.Persistence.DbConnectionExtensions.IsAvailable(IDbConnection connection)