I've been getting this the past few times I started Borderlands 3. It shows the logo screens, it says "Optimizing Shaders" then this appears and it closes. I've tried restarting my computer (this time it wouldn't restart even when I left it on overnight. I had to hold the power button). Admittedly I'm running a very old rig from 2013 so that may be part of it.
Samsung Series 7 Gamer; Windows 10 64-bit Home; 24GB DDR3 RAM; System Model: 700G7C; BIOS: P02ABA.041.130320.DK; Processor: Intel Core i7-3630QM CPU @ 2.40GHz (8 CPUs), ~2.4GHz; DirectX Version: 12; Graphics Card: AMD Radeon HD 7870M, AMD Radeon Graphics Processor (0x6825), Internal DAC(400MHz), VRAM: 2026 MB, DirectDraw Acceleration, Direct3D Acceleration, AGP Texture Acceleration.