in the folder mod\Ukrainian Ultima Ratio\decisions there is a bug with two of the files: WMD - Russia.txt and WMD - Turkey.txt
Replace
"research = The_Secret_of_the_Atom"
with "nuclear_weap
This will fix the issue.
edit: nvm, the commenting system won't let me properly type the fix required. Just look in all the other WMD decisions, and you should see the difference.
gamma_013
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