I cannot install Plots in Julia 1.6.1

General Usage
2 
(@v1.5) pkg> st
Status `C:\Users\Hermesr\.julia\environments\v1.5\Project.toml`
  [91a5bcdd] Plots v1.12.0

(@v1.5) pkg> add Roots
   Updating registry at `C:\Users\Hermesr\.julia\registries\General`
  Resolving package versions...
  Installed Roots ─ v1.0.8
Updating `C:\Users\Hermesr\.julia\environments\v1.5\Project.toml`
  [f2b01f46] + Roots v1.0.8
Updating `C:\Users\Hermesr\.julia\environments\v1.5\Manifest.toml`
  [f2b01f46] + Roots v1.0.8

(@v1.5) pkg> st
Status `C:\Users\Hermesr\.julia\environments\v1.5\Project.toml`
  [91a5bcdd] Plots v1.12.0
  [f2b01f46] Roots v1.0.8

(@v1.5) pkg>