They turned off the Foundry temporarily when Season 7 launched so that the missions could be converted to be compatible, which seems to be standard practice for each new season launch. It should be coming back soon, but as far as I know, no news yet.
Vice Admiral Laurence Corrin - USS Trafalgar
Captain Takaram ch'Rihan - USS Khellian
Captain Korax joH'a' vo'poH - USS Hartnell
General Hothkar, Son of Ta'lon - IKS oDwI'