Sims won't marry? (fixed with thanks)

I'm hoping @igazor or someone else in the community that knows might be able to answer. My sim got an imaginary friend as a child, as most do. We went through the process of making her real and then the two grew up and hit college/university together. They started going steady in university with no trouble at all and moved home. They have a child together and both decided they want to get married. I raised their interaction level to extremely irresistable and started looking for the option to propose. It has never come up for either one.

So I went on a google search and found that I could find the problem with NRAAS debug under (that mod we can't mention here) When clicking romance on the partner I get the message "Not actor/target partner" depending on which does the interaction. I have had no luck finding out what this means or why its happening let along how to fix it! Please help if you can!

**I thought the message maybe meant that one or both had other partners but neither has ever been in any other relationship and have no tags in the friends menu for romantic interests other than one another.