Extension cannot launch fortls

[BambOoxX]

Describe the bug
The extension show a pop-up message with

Error launching fortls: Please check that all selected options are supported by your language server version.

However, no specific options (except for fortls path) have been set (which may be the problem) but I can't see a list of them.
Searching the output of Modern Fortran logs shows

["INFO" - 14:24:15] Extension Name: Modern Fortran
["INFO" - 14:24:15] Extension Version: 3.0.202204291734
["INFO" - 14:24:15] Linter set to: ifort
["INFO" - 14:24:15] Formatter set to: findent
["INFO" - 14:24:15] Autocomplete set to: fortls
["INFO" - 14:24:15] Hover set to: fortls
["INFO" - 14:24:15] Symbols set to: fortls
["INFO" - 14:24:15] using linter: ifort located in: ifort
["INFO" - 14:24:15] Linter.arguments:
-warn
all
["INFO" - 14:24:15] Linter.include:

["INFO" - 14:24:15] Fortran Language Server
["INFO" - 14:25:01] using linter: ifort located in: ifort
["INFO" - 14:25:01] Linter.arguments:
-warn
all

The problem (or at least its symptoms) seems to be close to https://stackoverflow.com/q/72153608/9576551, however I can't see how https://gnikit.github.io/fortls/editor_integration.html#visual-studio-code can help understand which options to change to make fortls work.

Build info (please complete the following information):

• OS: Windows 10 20H2
• Extension Version v3.0.2022042917
• Visual Studio Code Version 1.67.2
• fortls version 2.7.0 installed with conda

Additional context
Add any other context about the problem here.

[gnikit]

Do you have FORTRAN Intellisense installed?

[BambOoxX]

No, I do not, given the anwer in https://stackoverflow.com/a/72336810/9576551 I figured it was not required.

[gnikit]

It is not, I am just trying to figure out what options are being passed. Could you post your fortran. settings from settings.json? Something seems to be out of sync.
I will convert this to a Q&A since this is not a bug but related to your configuration.