An email conversation between a top Hillary Clinton aide and a Clinton Foundation executive suggests the private server that Clinton and her staff used to communicate may have malfunctioned at least once during her tenure.

Huma Abedin, Clinton’s then-deputy chief of staff, complained that her private email was “down” the evening of Oct. 9 and into Oct. 10, 2012, according to an email chain obtained by Citizens United through the Freedom of Information Act.