It's a bug in One UI 6.0. When it's appear on the screen immediately click on Send feedback or close app. Also complaint to Samsung customer support through Samsung Members App as error report also send log files Along with this error report for this issue and wait for next update may be fix it by Samsung team soon. If you like please accept as a solution it's help to others users also, click on 3dots in my reply section and click on accept solution. Thanks.
As per your query, we would like to inform you that our concerned team is working on it. it will be fixed soon with an update meanwhile, for now, Use the Samsung keyboard inside the secure folder application. Clear the secure folder and keyboard app cache if getting the popup message ‘Samsung Keyboard Keeps Stopping’.
Navigation Path to clear keyboard cache: Settings > Apps > Show System Apps (enable) > Search Samsung Keyboard > Storage >Clear Cache.
Navigation Path to clear secure folder cache: Long Touch at ‘Secure Folder’ app icon > Open app Info screen > Storage > Clear Cache. Note: This is a temporary solution and helps the user to get rid of frequent keyboard crash messages he may require to repeat the cache clearance process if frequently using a Samsung keyboard inside a secure folder
In case the issue still occurs, kindly report the problems with a log file. To share a log file, click on the Samsung Members Application (Open Samsung Members Application > Support> Tap on error report > Type your query > Send).
