premier proが起動しない

お早うございます

一旦、ｖ14.0に戻してみたらいかがでしょうか。

同症状の他の投稿者が、v14.0に戻してみたら快適に動いていると報告されています。下記リンクの投稿をご覧ください。

https://community.adobe.com/t5/premiere-pro/起動しません/td-p/10938497?page=1 

Try resetting the preferences:
https://community.adobe.com/t5/Premiere-Pro/FAQ-How-to-reset-trash-preferences-in-Premiere-Pro/td-p/8236158

If that doesn't work, try resetting the Workspaces:
Reset a workspace
Reset the current workspace to return to its original, saved layout of panels.
1. Do one of the following:
• Click the Workspace menu icon and select Reset to Saved Layout.
• Choose Window > Workspace > Reset to Saved Layout.
from here:
https://helpx.adobe.com/premiere-pro/using/workspaces.html

If that doesn’t work, try updating or rolling back your graphics driver directly from the video card manufacturer’s site.

google translate

I am a beginner, but after updating yesterday, when I try to open premier Pro, it 
keeps loading and does not work. Anyone know why?

https://www.pugetsystems.com/labs/articles/PugetBench-for-Premiere-Pro-1519/
-Benchmark test program available for Premiere Pro CC2019 and CC2020
Some things to do, and more information needed for someone to help...
-Troubleshooting https://community.adobe.com/t5/Premiere-Pro/Unofficial-Premiere-Pro-Troubleshooting-Guide/td-p/8789200
-PPro Editing Information FAQ https://community.adobe.com/t5/Premiere-Pro/FAQ-What-information-should-I-provide-when-asking-a-question-on/td-p/3929027
-Mac only https://community.adobe.com/t5/Premiere-Pro/FAQ-Basic-Troubleshooting-amp-Maintenance-for-Premiere-Pro-on/td-p/4788764