[SOLVED] How do I open my file with Error: Keyframe already at time?

Hello, I was working on my project and when I opened it again I got the "Failed to open project. Check it is a valid Construct 3 single-file (.c3p) project."

I tried to check my old saves, and it seems that the error started when I saved files using r336 stable (just updated).

The error I have on my console is Error: keyframe already at time. Is there a way for me to recover my work or did the r336 stable break my save files? I am able to view the c3p archive, so maybe there is hope?

Also, is it possible to prevent updating for a period while working on a project to prevent it from happening again?

main.js:879

[Project] Exception opening: Error: keyframe already at time

at d.IJa (projectResources.js:1135:178)

at d.Npc (projectResources.js:1033:292)

at d.Ufb (projectResources.js:1726:452)

at d.BYb (projectResources.js:1804:395)

at async CCG.rn (main.js:855:1)

at async e.Qja (main.js:2555:42)

at async $oa (main.js:904:104)

at async Object.dK (main.js:2534:319)

qn main.js:879

CCG.rn main.js:855

Just an update for any unlucky soul that runs into the same thing, I figured it out--I saw the word keyframe and guessed that the issue probably had to do with timeline animations. I extracted the c3p archive, and deleted all the timeline animations that I worked on that day. I replaced it with old functioning timeline animations from older versions that worked just fine. I zipped it and renamed it back to c3p, and it opened up fine.

Sure, I lost a large part of the animations that I worked on, but at least I didn't lose the other stuff that I worked on.

I'm trying to investigate further, but I pretty sure the specific animation issue that caused the problem is a SpriteFont with opacity and color animations. Might be best to save multiple backups when working Timeline Animations, especially with SpriteFonts.