Package installation - KeyError: key "URIs" not found

Julia version: 1.5.3 (2020-11-09)
MacOS: 10.11.6

Error: Unable to add any packages. Same error as the following example of adding CSV -

**(@v1.5) pkg>** add CSV

**Resolving** package versions...

**ERROR:** KeyError: key "URIs" not found

Stacktrace:

[1] **getindex** at **./dict.jl:467** [inlined]

[2] **#37** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/manifest.jl:215** [inlined]

[3] **_all(** ::Pkg.Types.var"#37#40"{Dict{String,Bool}}, ::Dict{String,Base.UUID}, ::Colon **)** at **./reduce.jl:828**

[4] **all** at **./reduce.jl:823** [inlined]

[5] **destructure(** ::Dict{Base.UUID,Pkg.Types.PackageEntry} **)** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/manifest.jl:215**

[6] **write_manifest** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/manifest.jl:233** [inlined]

[7] **write_manifest** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/manifest.jl:231** [inlined]

[8] **write_env(** ::Pkg.Types.EnvCache; update_undo::Bool **)** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/Types.jl:1367**

[9] **write_env** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/Types.jl:1366** [inlined]

[10] **add(** ::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}, ::Array{Base.UUID,1}; preserve::Pkg.Types.PreserveLevel, platform::Pkg.BinaryPlatforms.MacOS **)** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/Operations.jl:1143**

[11] **add(** ::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}; preserve::Pkg.Types.PreserveLevel, platform::Pkg.BinaryPlatforms.MacOS, kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}} **)** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/API.jl:188**

[12] **add(** ::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1} **)** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/API.jl:139**

[13] **#add#21** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/API.jl:67** [inlined]

[14] **add(** ::Array{Pkg.Types.PackageSpec,1} **)** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/API.jl:67**

[15] **do_cmd!(** ::Pkg.REPLMode.Command, ::REPL.LineEditREPL **)** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/REPLMode/REPLMode.jl:404**

[16] **do_cmd(** ::REPL.LineEditREPL, ::String; do_rethrow::Bool **)** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/REPLMode/REPLMode.jl:382**

[17] **do_cmd** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/REPLMode/REPLMode.jl:377** [inlined]

[18] **(::Pkg.REPLMode.var"#24#27"{REPL.LineEditREPL,REPL.LineEdit.Prompt})(** ::REPL.LineEdit.MIState, ::Base.GenericIOBuffer{Array{UInt8,1}}, ::Bool **)** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/Pkg/src/REPLMode/REPLMode.jl:546**

[19] **#invokelatest#1** at **./essentials.jl:710** [inlined]

[20] **invokelatest** at **./essentials.jl:709** [inlined]

[21] **run_interface(** ::REPL.Terminals.TextTerminal, ::REPL.LineEdit.ModalInterface, ::REPL.LineEdit.MIState **)** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/REPL/src/LineEdit.jl:2355**

[22] **run_frontend(** ::REPL.LineEditREPL, ::REPL.REPLBackendRef **)** at **/Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/REPL/src/REPL.jl:1144**

[23] **(::REPL.var"#38#42"{REPL.LineEditREPL,REPL.REPLBackendRef})()** at **./task.jl:356**`Preformatted text`
1 Like

Reinstalling Julia solved this issue.
However, not sure what the cause of the issue was in the first place.