On December 31st, 2020, Adobe Flash Player died. To make this even more clear, this annoying thing will happen to anyone still using it:

To be clear, you can block this from happening by turning off Flash Updates. If you want to continue using Adobe Flash Player, you must turn off Updates before January 12, 2021. If you don’t, you’ll find yourself stuck with an Adobe Flash which is installed on your computer but won’t run content. Also, delay upgrading to Big Sur if you are reliant on Flash, as well as blocking the Windows Update which removes Flash from Windows. Don’t install Chrome 88 when it comes out, because it ends Flash support. Also, alternatively, you can just open Flash sites in Internet Explorer. Firefox will end flash support soon, so if you are a Firefox user, turn off updates. Edge users, also avoid updates. In case you don’t know how to block Flash Updates, which is by far the most important step, follow the instructions below:

Windows:

• Go to Control Panel > System & Security
• Click the Flash Player (32-bit) link.
• Click the Updates tab.
• Click Change Update Settings.
• In the UAC Prompt, click Allow.
• Then, change the tickbox from Allow Adobe to install updates (recommended) to Never check for updates (not recommended).

  

Mac OS X:

1. Open System Preferences.
2. Click Flash Player.
3. Click the Updates tab.
4. Change the tickbox from Allow Adobe to install updates (recommended) to Never check for updates (not recommended). 
5. Now, in the prompt, type your password and hit Enter.