if youre working w/out internet for a long period of time, you get stuck with this message until online.

It prevents you from starting/stopping the project which is annoying

Support definitely

Support for obvious reasons.
For now, i use inspect element to remove it.

Note that if you have no internet, then you can also use the 1.4 offline editor, the 2.0 offline editor, or the 3.0 offline editor. You can use the File button to save your project too and it won't have the Project could not save thing
3.0:
https://scratch.mit.edu/download (works on Windows 7 and up and you can get it on Vista [haven't tested on XP], and I think macOS 10.11 or 10.12 and up)
https://www.scratchfoundation.org/tools (alternate page)
2.0
https://scratch.mit.edu/download/scratch2 (if it doesn't show the downloads, go to https://download.scratch.mit.edu and then return to the page)
1.4
https://scratch.mit.edu/scratch_1.4/ (doesn't work on macOS Catalina and up due to lack of 32-bit support, but it works on Windows 2000 and up, including Windows 8.1 and up)

medians wrote:

Note that if you have no internet, then you can also use the 1.4 offline editor, the 2.0 offline editor, or the 3.0 offline editor. You can use the File button to save your project too and it won't have the Project could not save thing
3.0:
https://scratch.mit.edu/download (works on Windows 7 and up and you can get it on Vista [haven't tested on XP], and I think macOS 10.11 or 10.12 and up)
https://www.scratchfoundation.org/tools (alternate page)
2.0
https://scratch.mit.edu/download/scratch2 (if it doesn't show the downloads, go to https://download.scratch.mit.edu and then return to the page)
1.4
https://scratch.mit.edu/scratch_1.4/ (doesn't work on macOS Catalina and up due to lack of 32-bit support, but it works on Windows 2000 and up, including Windows 8.1 and up)

This is very good but at the same time if you are using a school Chromebook (Probably the most used device for scratch), then these probably won't work since Google play and Linux dev are usually disabled.