It seems that the highlight group LspDiagnosticsUnderline is deprecated. I couldn't find any mention of it in the neovim docs. Also, diagnostic undercurls were not working for me with this theme using neovim v0.9.1. Replacing LspDiagnosticsUnderline with DiagnosticUnderline fixed the issue.
It seems that the highlight group
LspDiagnosticsUnderline
is deprecated. I couldn't find any mention of it in the neovim docs. Also, diagnostic undercurls were not working for me with this theme using neovim v0.9.1. ReplacingLspDiagnosticsUnderline
withDiagnosticUnderline
fixed the issue.