Flash Player is no longer supported on mobile devices. Not sure what was installed on your system, but it I'd remove it.
If you want to view Flash content on your mobile device you can use any number of browser that render Flash in the cloud.
Adoce chat help told me to download from the archives. I've tried Firefox, dolphin, chrome, Samsung browsers. I still get the same message from the Department of Workforce Services website that says it's not equipped with the latest Flash Player
Flash Player hasn't been supported on mobile, since Android 4.1. Your Samsung S8 Plus most likely has Android 8. It's not going to work.
None of the browsers you mention render Flash in the cloud. You can try something like Puffin Browser - It’s Wicked Fast! or similar
Flash Plaeyr is only supported on desktop devices, see Tech specs | Adobe Flash Player for currently supported platforms.