I just have a new laptop machine and tried to install SharePoint designer 2013. When i open the site using designer, it opens , but blank workflow. I taught , the cache clear issue and i cleared it. Still, doesn't show up existing workflow.
2 Answers
Please check this other post here, they suggest installed Service Pack 1 to clear the issue.
Did you, by chance, try to open it using the Visio Designer? (DO NOT DO THIS FOR COMPLEX WORKFLOWS) I have done this for a complex workflow and it broke the Text-Based Designer. I'd also look to reinstall SharePoint Designer, as reinstalling fixed this for me.