Tab completion can't work

### Before Reporting

- [X] I have checked FAQ, and there is no solution to my issue
- [X] I have searched the existing issues, and there is no existing issue for my issue

### Describe your issue

Previously, after subscribing to Plus, the Tab key could be used for autocompletion. Now, the Tab key no longer completes code. I'm unsure if this is related to the Xcode upgrade.