You’re running into this issue here:
So this will be fixed with the next CSV release, for now you can just do add DataFrames@1.2 explicitly which will force Parser back down to v1:
(jl_HyZX36) pkg> add DataFrames@1.2
Resolving package versions...
Updating `C:\Users\ngudat\AppData\Local\Temp\jl_HyZX36\Project.toml`
[336ed68f] ↑ CSV v0.4.0 ⇒ v0.8.5
[a93c6f00] ↑ DataFrames v0.19.4 ⇒ v1.2.2
Updating `C:\Users\ngudat\AppData\Local\Temp\jl_HyZX36\Manifest.toml`
[336ed68f] ↑ CSV v0.4.0 ⇒ v0.8.5
[324d7699] - CategoricalArrays v0.6.0
[34da2185] ↑ Compat v2.2.1 ⇒ v3.34.0
[a8cc5b0e] + Crayons v4.0.4
[a93c6f00] ↑ DataFrames v0.19.4 ⇒ v1.2.2
[9a8bc11e] - DataStreams v0.4.2
[864edb3b] ↑ DataStructures v0.17.20 ⇒ v0.18.10
[59287772] + Formatting v0.4.2
[92d709cd] + IrrationalConstants v0.1.0
[2ab3a3ac] ↑ LogExpFunctions v0.2.5 ⇒ v0.3.0
[e1d29d7a] ↑ Missings v0.4.5 ⇒ v1.0.1
[69de0a69] ↓ Parsers v2.0.3 ⇒ v1.1.2
[2dfb63ee] ↑ PooledArrays v0.5.3 ⇒ v1.3.0
[08abe8d2] + PrettyTables v1.1.0
[189a3867] ↑ Reexport v0.2.0 ⇒ v1.2.2
[91c51154] + SentinelArrays v1.3.7
[a2af1166] ↑ SortingAlgorithms v0.3.1 ⇒ v1.0.1
[4c63d2b9] ↑ StatsFuns v0.9.8 ⇒ v0.9.10
[bd369af6] ↑ Tables v0.2.11 ⇒ v1.5.0
[ea10d353] - WeakRefStrings v0.5.8
[9abbd945] - Profile