SL2 Slides Go White and Fill with a Big Red X

Hi all 

Running into the same issue. 

I'm translating a EN to NL module and due to the amount of text boxes, shapes and basically NL being a much longer language in characters, I'm copying the text to OneNote, translating myself and then copying back. 

I've done about 7 scenes by now without every running into this infamous "Red X of Death". However, I'm currently doing a slide that has 4 layers, where I've recreated a book with some text on it. Everytime I click on one of these text boxes to copy in the translated text, it turns white with a red cross. It is an ordinary MS font, and I'm not copying from tables but from MS OneNote. 

I've done the basic troubleshooting: 

• Closing & reopening Storyline, restarting the pc
• Copying the file to my desktop and reloading
• Creating a new project and importing the slides
• I've now tried to recreate the layer and that was going well but then AGAIN! 

I'm running Storyline 2, I do believe it's with all the latest updates though not 100% sure. 

Is doing the repair for SL my only other option? 

thanks in advance!