Looks like there is some hardware incompatibility - the whole window, except for a small bit in the top left corner where I can see the "Open Folder" icon, is black.
```
$ lapce
MESA-INTEL: warning: Haswell Vulkan support is incomplete
$ uname -r
5.13.0-35-generic x86_64 x86_64
```
Ubuntu 21.10
That error is your drivers saying they have incomplete Vulcan support. It could work if you update to a recent version of Ubuntu or use the extended hardware support release.
``` $ lapce MESA-INTEL: warning: Haswell Vulkan support is incomplete $ uname -r 5.13.0-35-generic x86_64 x86_64 ``` Ubuntu 21.10