In file included from sketch\src\HAL\DUE\usb\../../../inc/../../Configuration_adv.h:1:0, from sketch\src\HAL\DUE\usb\../../../inc/MarlinConfigPre.h:51, from sketch\src\HAL\DUE\usb\conf_usb.h:51, from sketch\src\HAL\DUE\usb\udi_cdc_desc.c:49: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:1: error: unknown type name 'class' class Stepper { ^ C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:15: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token class Stepper { ^ In file included from sketch\src\HAL\DUE\usb\../../../inc/../../Configuration_adv.h:1:0, from sketch\src\HAL\DUE\usb\../../../inc/MarlinConfigPre.h:51, from sketch\src\HAL\DUE\usb\conf_usb.h:51, from sketch\src\HAL\DUE\usb\udi_cdc.c:49: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:1: error: unknown type name 'class' class Stepper { ^ C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:15: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token class Stepper { ^ In file included from sketch\src\HAL\DUE\usb\../../../inc/../../Configuration_adv.h:1:0, from sketch\src\HAL\DUE\usb\../../../inc/MarlinConfigPre.h:51, from sketch\src\HAL\DUE\usb\conf_usb.h:51, from sketch\src\HAL\DUE\usb\udc.c:49: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:1: error: unknown type name 'class' class Stepper { ^ C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:15: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token class Stepper { ^ In file included from sketch\src\HAL\DUE\usb\../../../inc/../../Configuration_adv.h:1:0, from sketch\src\HAL\DUE\usb\../../../inc/MarlinConfigPre.h:51, from sketch\src\HAL\DUE\usb\conf_usb.h:51, from sketch\src\HAL\DUE\usb\udi_msc.c:49: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:1: error: unknown type name 'class' class Stepper { ^ C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:15: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token class Stepper { ^ In file included from sketch\src\HAL\DUE\usb\../../../inc/../../Configuration_adv.h:1:0, from sketch\src\HAL\DUE\usb\../../../inc/MarlinConfigPre.h:51, from sketch\src\HAL\DUE\usb\conf_usb.h:51, from sketch\src\HAL\DUE\usb\udi_composite_desc.c:49: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:1: error: unknown type name 'class' class Stepper { ^ C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:15: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token class Stepper { ^ In file included from sketch\src\HAL\DUE\usb\../../../inc/../../Configuration_adv.h:1:0, from sketch\src\HAL\DUE\usb\../../../inc/MarlinConfigPre.h:51, from sketch\src\HAL\DUE\usb\conf_access.h:51, from sketch\src\HAL\DUE\usb\ctrl_access.h:77, from sketch\src\HAL\DUE\usb\ctrl_access.c:69: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:1: error: unknown type name 'class' class Stepper { ^ C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:15: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token class Stepper { ^ In file included from sketch\src\HAL\DUE\usb\../../../inc/../../Configuration_adv.h:1:0, from sketch\src\HAL\DUE\usb\../../../inc/MarlinConfigPre.h:51, from sketch\src\HAL\DUE\usb\conf_usb.h:51, from sketch\src\HAL\DUE\usb\uotghs_device_due.c:53: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:1: error: unknown type name 'class' class Stepper { ^ C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:15: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token class Stepper { ^ In file included from sketch\src\HAL\DUE\usb\../../../inc/../../Configuration_adv.h:1:0, from sketch\src\HAL\DUE\usb\../../../inc/MarlinConfigPre.h:51, from sketch\src\HAL\DUE\usb\conf_usb.h:51, from sketch\src\HAL\DUE\usb\usb_task.c:51: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:1: error: unknown type name 'class' class Stepper { ^ C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\Stepper\src/Stepper.h:83:15: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token class Stepper { ^ exit status 1 Fehler beim Kompilieren für das Board Arduino Due (Native USB Port).