Project with UART Rx in DMA interrupt mode and two timers timer 6 and 7 configured for interrupts. Not getting data using STM32F446RE nucleo Board

[PAcha.1]

I have written a code to receive UART data in DMA interrupt mode using circular buffer and configured timer 6 and timer 7 for doing other tasks in the same code. The problem I am facing is that I am not getting UART data and neither timer interrupts are generated, but when i comment UART code Timer interupt is generated and similarly when i comment timer code i am getting UART data. I need both for my project. Please let me know how shall i proceed

[Kamil Duljas]

Paste some code please. It is not information enough ​