Curious. I just copy-paste your Group config into my working OH 2.5.0
(after fixing quotemarks) -
openhab.log
2020-04-26 20:22:31.056 [INFO ] [el.core.internal.ModelRepositoryImpl] - Refreshing model 'doors.items'
2020-04-26 20:22:31.069 [ERROR] [el.item.internal.GenericItemProvider] - Binding configuration of type 'expire' of item 'Licht_im_Flur_5minOFF' could not be parsed correctly.