Error while adding a package

Thank you for the reply. What is the exact command? I’ve tried to reinstall Julia Pro, but now I get this error:

ERROR: GitError(Code:EMERGECONFLICT, Class:Checkout, 176 conflicts prevent checkout)
Stacktrace:
 [1] macro expansion at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\LibGit2\src\error.jl:101 [inlined]
 [2] #checkout_tree#46(::LibGit2.CheckoutOptions, ::Function, ::LibGit2.GitRepo, ::LibGit2.GitCommit) at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\LibGit2\src\repository.jl:358
 [3] checkout_tree at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\LibGit2\src\repository.jl:356 [inlined]
 [4] ffmerge!(::LibGit2.GitRepo, ::LibGit2.GitAnnotated) at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\LibGit2\src\merge.jl:107
 [5] #merge!#89(::LibGit2.MergeOptions, ::LibGit2.CheckoutOptions, ::Function, ::LibGit2.GitRepo, ::Array{LibGit2.GitAnnotated,1}, ::Bool) at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\LibGit2\src\merge.jl:234
 [6] #merge! at .\none:0 [inlined]
 [7] #merge!#140(::String, ::String, ::Bool, ::LibGit2.MergeOptions, ::LibGit2.CheckoutOptions, ::Function, ::LibGit2.GitRepo) at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\LibGit2\src\LibGit2.jl:784
 [8] #merge! at .\none:0 [inlined]
 [9] update_registries(::Pkg.Types.Context, ::Array{Pkg.Types.RegistrySpec,1}) at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\Pkg\src\Types.jl:1254
 [10] update_registries at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\Pkg\src\Types.jl:1219 [inlined]
 [11] #handle_repos_add!#61(::Bool, ::Nothing, ::Function, ::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\Pkg\src\Types.jl:719
 [12] #handle_repos_add! at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\Pkg\src\API.jl:0 [inlined]
 [13] #add_or_develop#15(::Symbol, ::Bool, ::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::Function, ::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\Pkg\src\API.jl:42
 [14] #add_or_develop at .\none:0 [inlined]
 [15] #add_or_develop#14 at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\Pkg\src\API.jl:31 [inlined]
 [16] #add_or_develop at .\none:0 [inlined]
 [17] #add_or_develop#13 at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\Pkg\src\API.jl:29 [inlined]
 [18] #add_or_develop at .\none:0 [inlined]
 [19] #add_or_develop#12(::Base.Iterators.Pairs{Symbol,Symbol,Tuple{Symbol},NamedTuple{(:mode,),Tuple{Symbol}}}, ::Function, ::String) at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\Pkg\src\API.jl:28
 [20] #add_or_develop at .\none:0 [inlined]
 [21] #add#20 at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\Pkg\src\API.jl:59 [inlined]
 [22] add(::String) at C:\Users\julia\AppData\Local\Julia-1.1.0\share\julia\stdlib\v1.1\Pkg\src\API.jl:59
 [23] top-level scope at none:0