Random error from :LspSaga hover_doc

Describe the bug

I randomly get this error from LspSaga:

For context, my ShowHelp() just calls :LspSaga hover_doc:

" Show documentation for word under cursor using builtin :help for vim and
" help files and LSP for everything else
function! ShowHelp()
    if index(['vim','help'], &filetype) >= 0
        execute 'vert bo h '.expand('<cword>')
    else
        execute 'Lspsaga hover_doc'
    endif
endfunction

Steps to reproduce

I have no clear recipe to reproduce the issue.

Expected behavior

No error.

Neovim version (nvim -v)

0.10.0

lspsaga commit

6f920cf

Terminal name/version

Gnome Terminal 3.44.0

Start at the :LspSaga hover_doc entry point and inspect the error shown in the attached report, using the provided Neovim 0.10.0 and lspsaga commit 6f920cf versions. Try to establish a reproducible trigger; done means identifying and preventing the reported error, with a regression check if the project has a relevant test.