First of all, thank you for developing this amazing plug-in.
After some initial problems, i got it finally running in our company network.
The main issue is, that the "Install UVLS" button does not work as it uses the GitHub API (https://api.github.com/repos/Universal-Variability-Language/uvl-lsp/releases/latest) that is more or less permanently on its rate limit in our network.
The solution is to manually download the server (in my case from https://github.com/Universal-Variability-Language/uvl-lsp/releases/download/v0.4.1/uvls-v0.4.1-x86_64-windows.zip) and place it somewhere.
The second issue arises, when the dialog behind the "Specify Path" button is used. For me it appends a "/" in front of the selected path, making it unusable. The path should rather be set using the settings of the plug-in.