Sorry to hear about the issue and for not answering you sooner.
What type of projects are you trying to open? Is there a video or template? Do you see an error message? Did you create your projects on the new or old version?
Here are some workaround that might help: • Try opening from another browser, such as Microsoft Edge, Safari or Chrome • Test in incognito or privacy mode. • Clear the cache/cookies from the browser
If the issues persist, please send a screenshot so we can see what you're experiencing.