Hello @Furki81
Using TIM1 and FreeRTOS shouldn’t be a problem. Except if you’ve also configured TIM1 as FreeRTOS SysTick timer ? That would cause problems, of course.
Otherwise you should add some more details to get useful assistance.
Which MCU type, FreeRTOS version + port, IDE or SDK used (sounds like STM32 HAL based application ?) and maybe the related, problematic code (quoted by enclosing it by 3 tildes ‘~’ or backticks ‘`’ or using the </> button.