No exception handling leads to generic error messages

[johanneslatzelnmb]

The scripts do not catch any exceptions. This can be implemented by adding try-catch-blocks where applicable. Since exception are not caught any exceptional situation might cause the script to fail and have PRTG display a very generic error message: "XML: The returned XML does not match the expected schema. (code: PE233) -- JSON: The returned JSON does not match the expected structure (Invalid JSON.). (code: PE231)".