Biden’s digital director Rob Flaherty blasted Facebook for providing “no clarity on the widespread issues that are plaguing all of our ad campaigns since the onset of their new ad restrictions,” he said in a statement shared first with POLITICO. Flaherty demanded that Facebook “take steps today to clearly rectify and explain the depth of this fiasco.”

In a Thursday evening blog post, Facebook wrote that "even though the majority of political and issue ads have been unaffected, since the restriction took effect, we have identified a number of unanticipated issues affecting campaigns of both political parties. Some were technical problems. Others were because advertisers did not understand the instructions we provided about when and how to make changes to ad targeting. We have implemented changes to fix these issues, and most political ads are now running without any problems."

"We understand that time is of the essence at this stage of the campaign season," the post from Facebook continued, adding: " Our teams are 100-percent dedicated to resolving any problems that may come up as quickly as possible."

Megan Clasen, senior paid media adviser for Biden, tweeted Thursday that ads touting Biden’s pledge not to raise taxes on people making under $400,000 are among the ones that got pulled on "certain key targeting tracks" on Facebook.

“We find ourselves five days out from Election Day unable to trust that our ads will run properly, or if our opponents are being given an unfair, partisan advantage,” Flaherty continued. “It is abundantly clear that Facebook was wholly unprepared to handle this election despite having four years to prepare.”

The Biden campaign also said their ability to adjust ad budgets and spending for some Facebook ads — a feature that Facebook said would still be allowed during this period — were still frozen as well.

President Donald Trump’s campaign confirmed Wednesday that some of their pre-approved ads were also pulled from the platform. The Trump campaign did not immediately respond to questions about whether they were still dealing with the issue Thursday evening.

While digital consultants told POLITICO that Facebook had acknowledged the “technical glitch” plaguing some of their ads earlier this week, many added they were left in the dark as to what caused the problems. The problem was widespread, impacting both Democratic and Republican campaigns up and down the ballot.

The controversy has stoked new fears among many political operatives about just when Facebook would cut off their ban, which includes a total blackout on political ads old and new after Election Day. Any long-term ban would be a hugely consequential decision that would reshape campaign fundraising and voter outreach. But Facebook, in a statement, said that its political ad ban was temporary.

Priorities USA Action, one of the biggest Democratic super PACs, also saw nearly 600 pre-approved ads removed from the site for more than two days, ad programs totaling in the six-figure range that particularly impacted North Carolina and Arizona. As of Thursday afternoon, those ads have been restored.

“The last two days demonstrate a refusal to act responsibly without public pressure,” Priorities USA Chairman Guy Cecil said in a statement Thursday afternoon. “While we are one of the largest spenders on digital ads in either party, it should not take a public campaign and endless calls to get Facebook to act. This is much harder for the many smaller organizations that are working to combat misinformation and voter suppression that do not have the connections and resources of a large group like ours.”