Just to let you know, if you save and restart the game, the toolbar will work as intended again. It's a workaround at least until the mod is updated again.
Here's an unofficial update for Improved Quality of Life which fixes compatibility with Stardew Valley 1.2, until @DEMIACLE has a chance to look at the pull request.
it maybe a little bit late but how the secondplaythrough mod going? any update yet i really love that mod
