Muse crashed when I'm working in all compositions widgets and had the same error.
Any thoughts and suggestions or any workaround on how to fix this?
Many apologies to find you in this trouble.
However, would you mind sharing your .muse file with us so that we can investigate and try fixing it?
For sharing the file you can follow the steps explained here - https://forums.adobe.com/docs/DOC-8652 and send the link to me in a private message.
For doing a private message hover the mouse on my picture and click "message".
Thank you for sharing the file with me.
I have tested your file, and issue was found with construction of composition in the smaller breakpoints.
Once I deleted all the smaller breakpoints there wasn't any issue in adding more triggers.
There is a suggestion, for the kind of layout you are working on it would be good to start building the composition in smallest breakpoint and then go on modifying them in larger breakpoints accordingly.
Its a personal suggestion which i found very useful while working with complex compositions.