Here are several things to try Desire:
1) Clear your browser cache
3) Change browsers. What browser are you using?
4) This could be an issue with your WIFI / Internet network. Is this a private WIFI or on a school network?
5) Sometimes closing your PC and restarting helps.
If none of these suggestions helps to get your Project to load, please tell us more. Have you multiple saves of your Project using Save project as.... or Checkpoint. Sometimes if a users has lots of these it creates issues.. Does this happen with a new Project or just an existing Project. If a new Project loads and this does not, there could be issues with your code depending on what your app does. Did you ever code the Project using Thunkable or other third party AI similar compiler and are now using an aia that was once compiled in the other compiler? Doing that sometimes causes Project corruption, issues in loading etc.
Let us know.
Regards,
Steve