Yes I do have EML 2.0.0 installed, as for the Quality of life bug as I have experienced it repeatedly (For best results both characters should have the same classes available before level up, I.E. both first time level up picking something like Worker)
step 1 get enough Experience to level up a couple characters.
Step 2 open up the character click the option that takes you to classes and skills.
Step 3 select a class to level up with.
Step 4 Use the Arrows up top to move to the next character
Step 5 open the Class and skills tab this is where I would often find that the second character is now missing the class chosen by the first and if the first character doesn't have enough points to level up it won't let you level up the character. (Exiting out to Mansion before going to level up the second character or toggling showing locked classes will allow selection)