Compilation error?

Hi,
since a couple of days i get a strange Error.
Maybe someone has a sollution…

error/log

“System.Exception: compilation error: (309,51): error CS0266: Cannot implicitly convert type ‘System.Collections.Generic.IEnumerable<Sanderling.Parse.IMenu>’ to ‘Sanderling.Interface.MemoryStruct.IMenu[]’. An explicit conversion exists (are you missing a cast?)\r\n bei BotSharp.ScriptRun.ScriptRun.<>c__DisplayClass61_0.b__0()”,

current state

next statement to execute
location: line 308
Sanderling.Interface.MemoryStruct.IMenu[] Menu => Measurement?.Menu

Completely reinstalled that computer

Windows 7 ( ist was 10 before… ), .Net, Eve, Sanderling…

Same Error ;O/