Blocks won't load!

I don't know what to do! I keep getting this error message when I try to do anything!

The blocks area did not load properly. Changes to the blocks for screen 6080492099862528_Screen1 will not be saved.

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is this a large project? how many screens do you have? loads of blocks?

you project seems to be corrupted somehow

import your latest backup and restart from there

see the following general tips and in your case especially #3 and #6

1. Use different screens wisely

Before starting to create another screen, first you should think about is it really necessary? See also Building apps with many screens and SteveJG's post about advantages/disadvantages, because in only one screen you also can use vertical arrangements to simulate different screens, just set the arrangements to visible = true/false as needed... See also Martyn_HK's example about how to use Tabs in AppInventor and another example from Cyd. 

The recommended method of switching screens in App Inventor
manager.aia

2. App Inventor works best if you use images whose size matches the size you want them to appear on your screen. If you import larger images into your app, your app may run out of system memory. Using Images with App Inventor

3. Avoid redundancy

Probably it helps to read chapter 19 - 21 in Dave's book http://www.appinventor.org/book2 to get an idea how to do DRY programming with App Inventor - Don't repeat yourself 

4. See SteveJG's monster list of tips and tricks

5. How to overcome the App Inventor project limit of 10 MB
FileByFile.aia
FileByFile_Drive.aia

6. Backup your project frequently

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Also make sure that you are using Chrome, Firefox, or Safari. Currently we do not support Internet Explorer or Edge, and you will get this error every time if that's the case.

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