The block editor times out when clicked. The code contains roughly 2000 blocks.
This URL allows you to open AI2 to the Project List, without opening any project.
http://ai2.appinventor.mit.edu/?autoload=false
From that list, you can request Exports of Projects without trying to open them.
Upload the troublesome .aia here.
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Firefox tends to have the best performance of all of the major browsers when it comes to rendering large block workspaces. You may also want to quit any unneeded software running on your computer if it is underpowered in terms of CPU and RAM if 2000 blocks are encountering performance issues.
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