Latrun Prime Incarnon issue

Heya folks,

after searching the web up and down I couldn't find a proper answer to my issue.

Got my Latron Prime and installed the incarnon. It skipped evolution 1, all usual so far, now evolution 2 wants a solo mission with the Latron equipped. Did what they asked and made the solo mission, no progress. Unequipped all my other weapons to be sure and also removed the companion and yet still the task refuses to complete. Oddly enough i am also not able to trigger the incarnon mode on the weapon no matter how many crits I land. The bar fills and goes back to empty without anything happening.

Anyone had this issue and may be able to help?