I've been playing since January and have created several ship models in the Galactic Civilizations IV Supernova Ship Designer. I wanted to upload them to the Steam Workshop, but recently I encountered an issue.
For ship models that I created before March 13th, the upload button is blocked, and I can't send them to the Steam Workshop. However, models created from scratch after that date upload without problems.
All the blocked models were made using my own custom ship templates, which I designed from scratch before March 5th. Even if I modify these old templates and create new models from them, the issue persists. That is, the game does not correctly recognize the authorship of my old templates and blocks all models based on them for uploading!
At the same time, these older models still appear correctly in-game, and they are listed under my Steam Workshop author profile. Models are quite complex, remaking will take a long time...