When I write /ubertool, this happens
Failed to call hook 'SendImage' on plugin 'ImageLibrary v2.0.62' (SqliteException: Could not finalize SQL statement: database disk image is malformed (11))
  at Facepunch.Sqlite.Database.Finalize (System.IntPtr stmHandle) [0x00032] in <6a09112247604f92bb8825dbb8e1b486>:0
at Facepunch.Sqlite.Database.FinalizeOrReset (System.IntPtr stmHandle, System.Boolean finalize) [0x00003] in <6a09112247604f92bb8825dbb8e1b486>:0
at Facepunch.Sqlite.Database.ExecuteAndReadQueryResult[T] (System.IntPtr stmHandle, System.Boolean finalize) [0x00029] in <6a09112247604f92bb8825dbb8e1b486>:0
at Facepunch.Sqlite.Database.Query[TOut,T1,T2,T3,T4] (System.String query, T1 arg1, T2 arg2, T3 arg3, T4 arg4) [0x0002a] in <6a09112247604f92bb8825dbb8e1b486>:0
at FileStorage.Get (System.UInt32 crc, FileStorage+Type type, NetworkableId entityID, System.UInt32 numID) [0x00044] in <4884905e86504ab6ae5a13297a5a4ba5>:0
at Oxide.Plugins.ImageLibrary.IsInStorage (System.UInt32 crc) [0x00000] in <fa01ab6355c0400cbf8af6b8c231ea2f>:0
at Oxide.Plugins.ImageLibrary.HasImage (System.String imageName, System.UInt64 imageId) [0x0002e] in <fa01ab6355c0400cbf8af6b8c231ea2f>:0
at Oxide.Plugins.ImageLibrary.SendImage (BasePlayer player, System.String imageName, System.UInt64 imageId) [0x00000] in <fa01ab6355c0400cbf8af6b8c231ea2f>:0
at Oxide.Plugins.ImageLibrary.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00ad2] in <fa01ab6355c0400cbf8af6b8c231ea2f>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <cd9a02fd331347bd82d550bb1a9c8e9f>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <b76ec77c47d1449e92b2baab8603843d>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <b76ec77c47d1449e92b2baab8603843d>:0
https://i.imgur.com/989NBLy.png
reinstalling the server and Image Library did not help

what version of Ubertool are you using.  This happened to me when I let it slip out of date.  My version is 1.4.34 and it's running fine.  I don't thing reinstalling the Server has anything  to do with it. 

Also, are you running anything else that is dependant on Image Library?  Like GUIShop or SkinBox?