The newspaper said the Bundestag's European law experts had concluded that even the "short, limited" two- or three-month extension to article 50 beyond 29 March promised to MPs by Theresa May if they again vote down her Brexit deal could prove problematic.
While that was widely expected, Labour had said this week that its failure would be the trigger for the main opposition party to pledge its support for a new referendum.
"The reality is the substance, rather than the vehicle or the means or the label, is what matters and we need to see substantial, substantive, legally binding changes to the withdrawal agreement", Raab told BBC radio on Friday.
He is the 14th member of Theresa May's government to resign over Brexit.
George Eustice, a seasoned Brexit campaigner who even stood for election for UKIP in the 1990s before becoming a Conservative member of parliament and then junior minister tendered his resignation from the cabinet to the Prime Minister in a strongly worded letter Thursday.
Cooper had refused to drop her amendment despite the government backing because she said she wanted to hold the Prime Minister to her word.
Speaking after meeting Kurz in Vienna, chief EU Brexit negotiator Michel Barnier said any delay "must serve not to put off the problem but to resolve the problem" in the British Parliament. If Britain leaves with a deal, there will be no change until at least the end of 2020.
Brexit has since been delayed whilst Mrs May works towards a deal for the United Kingdom ahead of a scheduled leave date of 29 March 2019.
The beleaguered British leader is also set to face a series of votes on various amendments tabled by MPs, including cross-party moves to lock in her commitments made on Tuesday.
R. Kelly signs autographs for fans at McDonald's after jail release
Questions about Kelly's dwindling finances surfaces after he couldn't manage to post bail following his arrest Friday night. According to Kelly's lawyers, the artist was initially unable to pay the $100,000 required for him to be released on bond.
"If Great Britain needs more time we will not oppose it but of course we are seeking an orderly exit", said German Chancellor Angela Merkel at the same press conference.
Despite May's dismissal, the amendment has received widespread support, with 141 MPs listed as signatories, and was passed unopposed during a parliament vote on Wednesday.
A new party backed by Nigel Farage, the insurgent who helped shove Britain toward the European Union exit, has a message for the country's leaders: The foundations of the political system will explode if Brexit is betrayed.
Barnier said that talks with the United Kingdom government would continue next week.
If May's deal is rejected, parliament will get to vote by March 13 on whether or not to go for a March 29 no-deal.
May's government has already vowed to protect the rights of those in Britain but agreed to try to encourage a joint European Union approach.
While the rights of European Union and United Kingdom citizens remain somewhat confused, some of the EU27 published guidelines earlier this month on the immediate future of citizens' rights should the United Kingdom crash out of the European Union without a deal on March 29.
May is hoping to bring back a tweaked divorce accord for a parliamentary vote, which could come as early as next week but may not take place until March 12.
The Labour Party's motion for the United Kingdom to remain part of an EU customs union was defeated by 323 votes to 240 during the session on Wednesday, leading to party leader confirming previously announced plans to push for a public vote on the government's Brexit proposals.