Das sehe ich im Log :
2020.04.08 11:59:55 1: PERL WARNING: Use of uninitialized value in numeric eq (==) at ./FHEM/98_statistics.pm line 914.
2020.04.08 11:59:55 1: stacktrace:
2020.04.08 11:59:55 1: main::__ANON__ called by ./FHEM/98_statistics.pm (914)
2020.04.08 11:59:55 1: main::statistics_doStatisticSpecialPeriod2 called by ./FHEM/98_statistics.pm (782)
2020.04.08 11:59:55 1: main::statistics_doStatisticDelta called by ./FHEM/98_statistics.pm (461)
2020.04.08 11:59:55 1: main::statistics_DoStatistics called by ./FHEM/98_statistics.pm (396)
2020.04.08 11:59:55 1: main::statistics_DoStatisticsAll called by ./FHEM/98_statistics.pm (380)
2020.04.08 11:59:55 1: main::statistics_PeriodChange called by fhem.pl (3308)
2020.04.08 11:59:55 1: main::HandleTimeout called by fhem.pl (680)