The Liverpool supporters' union, Spirit of Shankly, is asking the club's owners to reconsider their positions immediately.
The Reds and other English supporters were left furious after plans were revealed on Sunday to start a new Super League.
The league would have involved the "big six" English clubs, along with teams from around Europe.
As of Tuesday night, all the English teams have withdrawn from the competition, including Liverpool.
In a statement released late on Tuesday, Spirit of Shankly wrote: "We note with anger that club owners FSG are still hanging on to this shattered nightmare of a European 'Super' League.
"We are calling on the FSG board to withdraw our club from this catastrophic idea and consider their positions with immediate effect. To coin a previous campaign of ours: not welcome here."