Failed to run command '/bgrade' on plugin 'BGrade'. (FormatException: Index (zero based) must be greater than or equal to zero and less than the size of the argument list.)
at System.Text.StringBuilder.AppendFormatHelper (System.IFormatProvider provider, System.String format, System.ParamsArray args) [0x000ff] in <fb001e01371b4adca20013e0ac763896>:0 10kb/s in, 57kb/s out
at System.String.FormatHelper (System.IFormatProvider provider, System.String format, System.ParamsArray args) [0x00023] in <fb001e01371b4adca20013e0ac763896>:0
at System.String.Format (System.String format, System.Object[] args) [0x00020] in <fb001e01371b4adca20013e0ac763896>:0
at Oxide.Plugins.BGradeExt.BGradeExtensions.Lang (System.String key, System.String id, System.Object[] args) [0x00011] in <9853b16841e843a7b11fc3d0c5fbd577>:0
at Oxide.Plugins.BGrade.BGradeCommand (BasePlayer player, System.String command, System.String[] args) [0x001f1] in <9853b16841e843a7b11fc3d0c5fbd577>:0
at Oxide.Game.Rust.Libraries.Command+ChatCommand.HandleCommand (BasePlayer sender, System.String name, System.String[] args) [0x0001b] in <382390609f924843af42e489795929f7>:0
at Oxide.Game.Rust.Libraries.Command.HandleChatCommand (BasePlayer sender, System.String name, System.String[] args) [0x00015] in <382390609f924843af42e489795929f7>:0
at Oxide.Game.Rust.RustCore.IOnPlayerCommand (BasePlayer basePlayer, System.String message) [0x000db] in <38239

Make sure you have the latest oxide build,
No errors on my server and working as normal

I beleive this may have been in combination with the Building skins mod.

Failed to run command '/bgrade' on plugin 'BGrade'. (FormatException: Index (zero based) must be greater than or equal to zero and less than the size of the argument list.)
at System.Text.StringBuilder.AppendFormatHelper (System.IFormatProvider provider, System.String format, System.ParamsArray args) [0x000f9] in <47fc8c70fa834cbf8141d7c1a7589125>:0 6kb/s in, 69kb/s out
at System.String.FormatHelper (System.IFormatProvider provider, System.String format, System.ParamsArray args) [0x00023] in <47fc8c70fa834cbf8141d7c1a7589125>:0
at System.String.Format (System.String format, System.Object[] args) [0x00020] in <47fc8c70fa834cbf8141d7c1a7589125>:0
at Oxide.Plugins.BGradeExt.BGradeExtensions.Lang (System.String key, System.String id, System.Object[] args) [0x00011] in <0383663f23ad4b8d9fe5d73782e2aa47>:0
at Oxide.Plugins.BGrade.BGradeCommand (BasePlayer player, System.String command, System.String[] args) [0x001f1] in <0383663f23ad4b8d9fe5d73782e2aa47>:0
at Oxide.Game.Rust.Libraries.Command+ChatCommand.HandleCommand (BasePlayer sender, System.String name, System.String[] args) [0x0001b] in <4f26abbc4cd64395afa68cc77aae57cc>:0
at Oxide.Game.Rust.Libraries.Command.HandleChatCommand (BasePlayer sender, System.String name, System.String[] args) [0x00015] in <4f26abbc4cd64395afa68cc77aae57cc>:0
at Oxide.Game.Rust.RustCore.IOnPlayerCommand (BasePlayer basePlayer, System.String message) [0x000db] in <4f26abbc