solargraph_utils.helpers.ServerError: Failed to start server:

[ik5]

using Fedora 28, ruby 2.5, pythong 3.6, solargraph 0.23.0, solargraph-utils.py v1.1.0 with neovim v0.3.0 with the latest version of this solargraph, and latest deoplete.

When entering insert mode, I get the following error message:

[deoplete] Traceback (most recent call last):                                                                                                                                                                      
  File "/home/ik/.config/nvim/plugged/deoplete-solargraph/rplugin/python3/deoplete/source/solargraph.py", line 56, in start_server                                                                                 
    self.server = solar.Server()                                                                                                                                                                                   
  File "/home/ik/.local/lib/python3.6/site-packages/solargraph_utils/core.py", line 19, in __init__                                                                                                                
    self.start()                                                                                                                                                                                                   
  File "/home/ik/.local/lib/python3.6/site-packages/solargraph_utils/core.py", line 42, in start                                                                                                                   
    raise ServerError('Failed to start server' + (output and ':\n' + output))                                                                                                                                      
solargraph_utils.helpers.ServerError: Failed to start server:                                                                                                                                                      
Could not find command "server".                                                                                                                                                                                   
Failed to start server:                                                                                                                                                                                            
Could not find command "server".                                                                                                                                                                                   
.  Use :messages / see above for error details.                                                                                                                                                                    
[deoplete] Traceback (most recent call last):                                                                                                                                                                      
  File "/home/ik/.config/nvim/plugged/deoplete-solargraph/rplugin/python3/deoplete/source/solargraph.py", line 56, in start_server                                                                                 
    self.server = solar.Server()                                                                                                                                                                                   
  File "/home/ik/.local/lib/python3.6/site-packages/solargraph_utils/core.py", line 19, in __init__                                                                                                                
    self.start()                                                                                                                                                                                                   
  File "/home/ik/.local/lib/python3.6/site-packages/solargraph_utils/core.py", line 42, in start                                                                                                                   
    raise ServerError('Failed to start server' + (output and ':\n' + output))                                                                                                                                      
solargraph_utils.helpers.ServerError: Failed to start server:                                                                                                                                                      
Could not find command "server".                                                                                                                                                                                   
Failed to start server:                                                                                                                                                                                            
Could not find command "server".                                                                                                                                                                                   
.  Use :messages / see above for error details.                                                                                                                                                                                                                                                                                                            
[deoplete] Traceback (most recent call last):                                                                                                                                                                      
  File "/home/ik/.config/nvim/plugged/deoplete-solargraph/rplugin/python3/deoplete/source/solargraph.py", line 56, in start_server                                                                                 
    self.server = solar.Server()                                                                                                                                                                                   
  File "/home/ik/.local/lib/python3.6/site-packages/solargraph_utils/core.py", line 19, in __init__                                                                                                                
    self.start()                                                                                                                                                                                                   
  File "/home/ik/.local/lib/python3.6/site-packages/solargraph_utils/core.py", line 42, in start                                                                                                                   
    raise ServerError('Failed to start server' + (output and ':\n' + output))                                                                                                                                      
solargraph_utils.helpers.ServerError: Failed to start server:                                                                                                                                                      
Could not find command "server".                                                                                                                                                                                   
Failed to start server:                                                                                                                                                                                            
Could not find command "server".                                                                                                                                                                                   
.  Use :messages / see above for error details. 

[castwide]

The deoplete-solargraph plugin uses the legacy web API, which has been deprecated in favor of the language server protocol. More information: uplus/deoplete-solargraph#10

In the absence of a more current plugin, deoplete-solargraph should still work with solargraph gem 0.17.4.

[ik5]

thank you