Describe the bug
There is no "S" button on adibags frame, I can't combine multiple items into one stack. For example, I have 2 slots of 5 bandages. It is expected that when the "S" button is pressed, they will merge into one stack.

To Reproduce
Steps to reproduce the behavior:

1. Press "B" to open adibags
2. There is no "S" button

Expected behavior
The appearance of the "S" button

Screenshots

World of Warcraft Release and Version (Retail 9.2.7, etc)

• wotlk classic 3.4.0.46248

AdiBags Version

• 1.9.40

Have you tried disabling all your other addons to ensure only this addon causes the issue?

• Yes

Wrath of the Lich King has no bag sort API as Blizzard decided to not backport this feature. For the stackable items, make sure you have the "Merge unstackable items" button selected in the Items option menu.