Can't debug in simulator or real board anymore

Hi,

I am not sure how to fully explain this issue, so please let me know what further information I should provide. I am trying to program my EK-TM4C123GXL board however after uploading some (probably faulty) code, Keil crashes after starting the debug session. If it helps, I was trying to set up Port D for interrupts. Also, I can no longer run simulations either. When I do, Keil says I have memory access violations. The strangest part is this issue now occurs when I try to upload previous working programs as well.

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