The long-running dispute is over a new commercial rights agreement for the squad, and the DBU has threatened to select players from Denmark's lower leagues rather than the likes of Spurs midfielder Eriksen, Chelsea defender Andreas Christensen and Leicester goalkeeper Kasper Schmeichel.
It all means that players from the Danish second division and even Futsal league are expected to be in a squad travelling to Slovakia on Tuesday afternoon for Wednesday's game.
Denmark may now have to turn to amateur or futsal players, a number of which have been called up to the preliminary 23-man squad, if no agreement is reached due to the fear of facing a hefty fine and being banned from Euro 2020.
"We need to solve this conflict now", Eriksen said, "not just dig the trenches deeper".
Tottenham star Eriksen has now implored the authorities to accept the offer of playing the next two matches under the terms of their old deal, insisting money is not the priority for the squad, who reached the last 16 of the World Cup in Russian Federation.
The union says players want sponsorship deals made by the association to continue to focus on the team and not individual players. "So we're happy to extend our hand again... let's renew the old deal by one month".
"The crucial thing is now that the two national matches will be played", DBU president Jesper Moller said. Tarup Paarup, a team near Odense, advised players to accept the DBU offer, according to Ritzau.
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The disagreement between the DBU and Spillerne concerns commercial rights, with the two parties negotiating for several months to try and resolve the issue. Sign it, and we will sit on the plane immediately.
Jensen, a former midfielder, is to temporarily replace the Norwegian Hareide.
"We feel a lot of support", Eriksen said in comments published by the players' union.
"We must hold the two worldwide matches to avoid fines of millions and the possible exclusion of the national team for several years", said DBU's team manager Kim Hallberg.
The DBU past year had to cancel a World Cup qualifying match for the women's national team against Sweden, also due to a contract dispute.
"We are here because we love playing for Denmark, and we are proud of the many millions we earn for the youth and breadth of Danish football, including by taking part in the DBU's events and for their sponsors".
"On behalf of DBU and Danish football, I am pleased that John Jensen has taken the hard task of being coach in both matches", he added.