Hello Tropy team 
I have been having a recurring issue in the past weeks (possibly since the 1.17.3 update? Not sure because I had been doing other stuff for a couple months and not using Tropy).
Issue: app throws an error when opening selections that are rotated. I believe only on rotated selections (i.e. I made a selection from an image and rotated it, then go to open that selection later). The error shows up and if I dismiss it, the Tropy screen is blank. I have to close and reopen the window, or even the app, but often it tries to reopen the same page, throwing the same error.
Error: {“msg”:“unhandled error: photo.displayObjectUpdateTransform is not a function”,“stack”:“TypeError: photo.displayObjectUpdateTransform is not a function\n at setIntermediatePosition (file:///Applications/Tropy.app/Contents/Resources/app.asar/lib/project-57Yc_NaO.js:59454:9)\n at Esper.sync (file:///Applications/Tropy.app/Contents/Resources/app.asar/lib/project-57Yc_NaO.js:58897:9)\n at Esper.componentDidUpdate (file:///Applications/Tropy.app/Contents/Resources/app.asar/lib/views/project.js:18552:126)\n at commitLayoutEffectOnFiber (file:///Applications/Tropy.app/Contents/Resources/app.asar/lib/settings-dgKQOa1J.js:10250:27)\n at recursivelyTraverseLayoutEffects (file:///Applications/Tropy.app/Contents/Resources/app.asar/lib/settings-dgKQOa1J.js:11121:8)\n at commitLayoutEffectOnFiber (file:///Applications/Tropy.app/Contents/Resources/app.asar/lib/settings-dgKQOa1J.js:10295:8)\n at recursivelyTraverseLayoutEffects (file:///Applications/Tropy.app/Contents/Resources/app.asar/lib/settings-dgKQOa1J.js:11121:8)\n at commitLayoutEffectOnFiber (file:///Applications/Tropy.app/Contents/Resources/app.asar/lib/settings-dgKQOa1J.js:10235:8)\n at recursivelyTraverseLayoutEffects (file:///Applications/Tropy.app/Contents/Resources/app.asar/lib/settings-dgKQOa1J.js:11121:8)\n at commitLayoutEffectOnFiber (file:///Applications/Tropy.app/Contents/Resources/app.asar/lib/settings-dgKQOa1J.js:10295:8)”,“system”:“Darwin 25.3.0 (arm64)”,“time”:1776175834094,“version”:“1.17.3”}
System: MacOS Tahoe 26.3, Tropy version 1.17.3. The images are all in iCloud but locally downloaded to the Mac.