Framework's code of "Unified Language Representation for Question Answering over Text, Tables, and Images"

I recently came across the paper "Unified Language Representation for Question Answering over Text, Tables, and Images" and noticed that the framework's code was mentioned to be available under the "tree" directory at this GitHub link (https://github.com/AlibabaResearch/DAMO-ConvAI/tree/main/solar). However, it seems that the "solar" directory is no longer available in your repository. Could you please guide me on where I can access the code for this framework?

Thank you in advance for your assistance.