The editor had some errors so I reimported everything and got it working again

Double Trouble/Assembly-CSharp-Editor.csproj

Double Trouble/Assembly-CSharp.csproj

Double Trouble/Library/APIUpdater/project-dependencies.graph

Double Trouble/Library/ArtifactDB

Double Trouble/Library/ArtifactDB-lock

Double Trouble/Library/CurrentLayout-default.dwlt

...nity.collab-proxy@1.3.9/Documentation~/images/example.png

...ollab-proxy@1.3.9/Editor/Assets/Icons/added-file-dark.png

...ab-proxy@1.3.9/Editor/Assets/Icons/added-file-dark@2x.png

...llab-proxy@1.3.9/Editor/Assets/Icons/added-file-light.png

...b-proxy@1.3.9/Editor/Assets/Icons/added-file-light@2x.png

...nity.collab-proxy@1.3.9/Editor/Assets/Icons/back-dark.png

...y.collab-proxy@1.3.9/Editor/Assets/Icons/back-dark@2x.png

...ity.collab-proxy@1.3.9/Editor/Assets/Icons/back-light.png

....collab-proxy@1.3.9/Editor/Assets/Icons/back-light@2x.png

...llab-proxy@1.3.9/Editor/Assets/Icons/choose-mine-dark.png

...b-proxy@1.3.9/Editor/Assets/Icons/choose-mine-dark@2x.png

...lab-proxy@1.3.9/Editor/Assets/Icons/choose-mine-light.png

...-proxy@1.3.9/Editor/Assets/Icons/choose-mine-light@2x.png

...ab-proxy@1.3.9/Editor/Assets/Icons/choose-remote-dark.png