This problem is an indication that you have MSI Afterburner / RivaTuner Statistics Server running. In some instances, if RivaTuner is detecting Haste, it prevents the Haste user interface from ever loading. This is easily fixed by preventing RivaTuner from detecting Haste. Follow these easy instructions to solve this issue.
- Open RivaTuner, click Add and find Haste.exe located in:
C:\Program Files\Haste\Haste Esports Accelerator
- Set Haste.exe application detection level to None
- Restart Haste, and it should load correctly!