Seaquel
SQL Server error code

SQL Server error 5846

SQL Server raises error 5846 at severity 16, which marks a problem with the query or data that you can correct.

Common language runtime (CLR) execution is not supported under lightweight pooling. Disable one of two options: "clr enabled" or "lightweight pooling".
Msg5846
Severity16
Group5000–5999

Source: Database Engine events and errors