Original Post — Direct link
To unlock Stage 2 of the Technician specialization I need to complete the Roosevelt Island mission on normal or higher difficulty before the invasion but it isn't registering and I can't progress further due to this.

So far, I've completed it on Story mode as well as on multiple difficulties, but the game just isn't marking it as completed. Logging out and back in isn't helping either.

According to Reddit and the PS4 forum this bug is months old but still an issue but I haven't read this to be a known issue for PC.
about 5 years ago - Ubi-Mark. - Direct link
Hello ippig, thanks for reaching out!

As @desrocchi mentioned, you have to clear the weekly invasion first in order to access the story mission. That would be the case of any required mission (if there's any). Also, I'm glad that the issue has been resolved. Happy gaming!