Failed to open Project.. How can I open it?

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Blackmid

- El Constructorr
- - Joined 3 Aug, 2019
  - 23 topics • 150 posts
- 1
- 1 Oct, 2022
- Quote
I am trying to open one of my old projects from November 2020, and I get this error:

This c3p file has always been saved in Google Drive (Cloud), and used to work fine back in those days. I even tried opening from the version it was saved in (r225), and still the same error.

F12 Console shows these errors:

I used addons (Firebase Basic, Firebase RD Basic, Firebase SDK, Photon), but I still have those addons in the addon manager.
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- dop2000
- - Joined 26 May, 2016
  - 139 topics • 12,612 posts
- 1
- 2 Oct, 2022
- Quote
It's most likely you've installed wrong versions of the addons (older or newer). Try installing other versions.

If this doesn't help, it's possible to manually remove the conditions and actions from the project files. Make a backup copy of the project, extract files to an empty folder, search the event sheet files for IDs which are mentioned in console log, for example "on-simple-read", and carefully delete the whole block from the file, preserving JSON structure.

This will allow to open the project, but you'll have to re-add deleted conditions and actions again.