@rlkoshak still struggling and trying out things. I now found the following error log which seems to be a good starting point to finally fix it. a lot is written regarding problems with InfluxDB in the community but not specifically to my error log.
Interesting as i guess due to this error there will not be written any data in InfluxDB…but MainUI independently seems to log historical data for each item…
2021-07-04 23:00:20.825 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'influxdb.persist'
2021-07-04 23:00:21.515 [ERROR] [nal.common.AbstractInvocationHandler] - An error occurred while calling method 'QueryablePersistenceService.query()' on 'org.openhab.persistence.influxdb.InfluxDBPersistenceService@ a0344f': error parsing query: found ALL, expected identifier at line 1, char 48
org.influxdb.InfluxDBException: error parsing query: found ALL, expected identifier at line 1, char 48
That is the persistence-file, InfluxDB version is 1.8x
// persistence strategies have a name and a definition and are referred to in the "Items" section
// for rrd charts, we need a cron strategy
everyMinute : "0 * * * * ?"
RH_Basement,LRMotionSensor_Temperature,PufferState,RestO2state,EGthermo,DGthermo : strategy = everyMinute
Hofer_Temps*,PowerMap*,EGvlauf,DGvlauf,Pool_Power,EVchargePower : strategy = everyMinute
LivingRoom_Power,PowerTotal,VeACkWhFor,VeACkWhRev,EnergyImpDaily,EnergyExpDaily,NG4EnergyExp,NG4EnergyExpDaily,PVisland_Power,PvXL_Power,Devolo3_Power,AirCon_Power,AirDryer_Power,TV_Power,PVislandVolt : strategy = everyMinute
DBtemp,YRtemp,NG4Top1temp,NG4Top1BathTemp,BathESPtemp,BaseESPtemp,AtticTemp,BaseESPhum,Base2ESPhum,Base2ESPtemp,TuyaSensor01_temp : strategy = everyMinute
PVng5sum,PvMicro_Power,NG4power,FibGarage_Power,BathESPvcc,SmartDisplay01vcc,SmartDisplay02vcc,AtticVcc,NG4Top1vcc,DBvcc,YRvcc,CollectorTemp : strategy = everyMinute
EPsolar_PVpower,EPsolar_CASEtemp,EPsolar_BATvolt,Rain_1h : strategy = everyMinute
BigSmartEPD1vcc,BigSmartEPD2vcc,BigSmartEPD3vcc,BigSmartEPD4vcc,BigSmartEPD5vcc : strategy = everyMinute
VeBatSoc,VeBatTemp,VeBatPower,VeMP2Temp : strategy = everyMinute