C# Code Extension : Data type not found

Following the sample (https://github.com/microsoft/sql-server-language-extensions/tree/main/language-extensions/dotnet-core-CSharp/sample/regex), I am getting the error message below:

Msg 39004, Level 16, State 20, Line 1
A 'dotnet' script error occurred during execution of 'sp_execute_external_script' with HRESULT 0x80004004. External script request id is CBDA2919-04A5-44A2-B393-359ED131E3C9.
STDOUT message(s) from external script: 
   at Microsoft.SqlServer.CSharpExtension.Sql.ToManagedDataType(Int16 SQLDataType) in C:\__w\1\s\sql-server-language-extensions\language-extensions\dotnet-core-CSharp\src\managed\utils\Sql.cs:line 106
   at Microsoft.SqlServer.CSharpExtension.CSharpExtension.<>c__DisplayClass10_0.<InitColumn>b__0() in C:\__w\1\s\sql-server-language-extensions\language-extensions\dotnet-core-CSharp\src\managed\CSharpExtension.cs:line 287
   at Microsoft.SqlServer.CSharpExtension.ExceptionUtils.WrapError(Action func) in C:\__w\1\s\sql-server-language-extensions\language-extensions\dotnet-core-CSharp\src\managed\utils\ExceptionUtils.cs:line 35Error: Data type not found.

Any idea?

Start by reproducing the regex sample in language-extensions/dotnet-core-CSharp/sample/regex, then inspect language-extensions/dotnet-core-CSharp/src/managed/utils/Sql.cs at the reported line 106 and the callers shown in the stack trace. Done means the sample no longer reports “Data type not found” for its input and the affected SQL type is handled consistently.