Dear Vlad,
as you are reading an NLog file, please do not use a log4net pattern but use Nlog layout renderers (see
https://github.com/nlog/nlog/wiki/Layout-Renderers).
Please note that the expression builder in the file receiver window currently only supports log4net patterns.
Your working Nlog pattern is
${date:format=yyyy-MM-dd HH\:mm\:ss.ffff}|${callsite}|${level}|${message}|${exception}
Yours sincerely
Philipp Lauchner
PROSA GmbH
Development & Support