Hey guys! I have resolved the Steam Guard problem when you already have steam guard protection. This resolution only apply for people that have the Founder’s Server Exclusive Access downloaded (steam dlc).
Step 1 - DELETE FOUNDER’S SERVER: EXCLUSIVE ACCESS 3
You need to mark off the option by going in the Tree of Savior properties and clicking the check mark for the correction.
Step 2 - VERIFY FILES INTEGRITY
Just click in the option verify the files to correct some dll problem in the properties option.
Step 3 - OPEN THE GAME AND HAVE FUN!
SCREENSHOT TO HELP:
OBS: When you mark off the pack option the steam will download some files, WAIT UNTIL THIS DOWNLOAD COMPLETE to keep the verify files part