After installing new theme version there is a chance there will be needed some plugins updates. You will see a similar notice like when installing the theme:
Click “Begin updating plugin” and update what is needed.
If you dismissed previously notice about required plugins, you also wont see it after theme update. To see it again you will have to deactivate and activate again theme. You can also check if there is menu Appearance → Install Plugins. If this menu option is available then go inside and check what need to be updated.