No Text and Designer Error when translating Labels

Hey there Support Team,

We have successfully set up your poster and integrated it. Finally, we wanted to translate the individual designations, but unfortunately an error occurred.

As soon as I had changed the designation in the image editing, the designer could no longer be opened!

Now that I have removed it, it works again, but the other translated slugs are no longer displayed. 

Could you please check this? Thx