Updating or adding data sources to data flow fails

When i try to update or add data to new or existing data flows, it fails when I hit Save and Close. It happens on all kind of data sources, and the error message appears instantly, withhout any spinning wheels or other thing indicating that something is beeing validated.

This started yesterday. Has anyone else experienced the same and is there something i could do to fix this?

There was an unexpected error.

SessionId: af1c6647-f330-4984-8a32-2ff9308cbee2

section Section1;
shared Endringslogg = let
Kilde = Csv.Document(File.Contents("\\bigateway\powerbi\Endringslogg.csv"), [Delimiter = ";", Columns = 8, Encoding = 65001, QuoteStyle = QuoteStyle.None]),
#"Forfremmede overskrifter" = Table.PromoteHeaders(Kilde, [PromoteAllScalars = true]),
#"Endret kolonnetype" = Table.TransformColumnTypes(#"Forfremmede overskrifter", {{"ID", Int64.Type}, {"AuthorName", type text}, {"AuthorScreenName", type text}, {"ProfilePic", type text}, {"Date", type date}, {"Text", type text}, {"Likes", Int64.Type}, {"Retweets", Int64.Type}})
in
#"Endret kolonnetype";