Same thing has happened to me. The solution in the thread you note does NOT work. There is no "my device" or "Samsung account" showing as described. Further, trying to restore bookmarks from the Samsung cloud "restore backups" option doesn't give the option to restore anything related to Samsung internet(although websearches state you should be able to restore bookmarks). This is the second time this has happened to me. Samsung cloud IS A JOKE. It only ever shows 1 prior backup which is over written by the next one(which is how I lost my bookmarks the first time... the backup that would have had my bookmarks was over written before I could figure out how to restore it) SAMSUNG CLOUD IS A FALSE SENSE OF SECURITY. There also is no way to export bookmarks from the Samsung browser.
Exporting bookmarks to another browser and backing them up to prevent loss are two basic functions. With all the greatness of Samsung products, they definitely get a FAIL on these two points. Come on Samsung... get you ***** together
