"Check it is a valid Construct 3 single-file" in Chrome browser

Using Construct3, I created a simple Test.c3p project in Chrome and saved it both locally and in the cloud (Dropbox). I close the project. When I try to open it again, I get the message Failed to open project. Check it is a valid Construct 3 single-file (.c3p) project. This happens on both local and cloud versions.

When I try to open this file in Brave browser, no problem. I also tried opening it in Edge and received the same "Failed to open project" message.

https://www.dropbox.com/scl/fi/civ63d6k2amdsr5ye99pt/Test.c3p?rlkey=1ohznpg3sx9lmpzy67jevct19&dl=0

Third party cookies are allowed in Chrome.

Any idea why this is happening? No problems in Brave browser, but Chrome is stuck.

I have a similar problem with Google Drive and Microsoft Edge. Whenever and however I try to open a file directly from Google Drive it just gives an error message, and when I download the file it says, just like your problem, "Check that this is a valid C3P file."

I double checked the Construct3 version, and they are current in both browsers.

F12 console made reference to third-party cookies not allowed in Chrome. My settings however allowed them.

Chrome is necessary for GitHub repositories since the Construct editor in Chrome can open project folders.

Any idea what is causing this?

This appears to be happening on Chrome and Edge (also Firefire) on Windows OS. On iOS it appears to be fine with Safari and Chrome.

If I download the .c3p file and drag-and-drop it in to Construct, it opens fine for me. So it seems the project file itself is OK.

If you're opening from the cloud, perhaps there is a problem with the cloud service. Maybe try signing out and signing back in, or try again later.

Thanks, Ashley. The drag and drop worked for both a single file and project folder open. The problem seemed to be with the Google Chrome app which failed to open the single local file. The local file was located on the hard drive.

So I reinstalled Google Chrome. This fixed this issue. Now the Open local file and Open local project folder work.