It looks like a national consortium of French academic institutions, Couperin.org, has decided to cancel their subscriptions to Springer Journals. They had been in negotiations with Springer for over a year, but were unable to come to an agreement on price. Couperin.org was advocating for a subscription price reduction due to the volume of APCs being paid by French authors. Springer had put forward a price increase. Access was supposed to be cut off on April 1st, but Springer has decided to keep access on while they continue to move discussions forward. You may remember that a similar event happened with German universities and Elsevier.