I want to add here that Clickteam Fusion 2.5 Free Edition as a non steam DMR app, runtime/project preview runs perfectly fine.
But still, steams version Clickteam Fusion 2.5+ project playtest/preview doesn't work.
Proton 8.0-5 - 9.0-3
Here some test reports I did on Steam Deck.
hotfix : runtime incompatible version.
3.16-9: icons properly shows, sometimes frame workflow shows black screen, before you resize or minimize window, but still runtime incompatible version.
steam-3.16-9-248170.log
3.7-8: similar to 3.16-9, but with correct interface and sometimes glitch with frame workflow problem.
steam-3.7-8-248170.log
4.2-9: similar to 3.7-8.
steam-4.2-9-248170.log
4.11-13: similar to 4.2-9, but icons startedto glitching.
steam-4.11-13-248170.log
5-0-10: similar to 4.11-13, but frame workflow shows blackscreen.
steam-5-0-10-248170.log
5.13-6: program has completly frozen after I entered to frame workflow.
steam-5.13-6-248170.log
6.3-8: same as 5.13-6.
7.0-6: it works as 3.7-8 but frame workflow works perfectly fine.
steam-7.0-6-248170.log
8.0-5: same as 7.0-6.
Uploading steam-8.0-5-248170.log…
9.0-3: same as 8.0-5, but the font is changed to different.
steam-9.0-3-248170.log
proton 8.0-5x1 2024-09
Compatibility Report
System Information
I confirm:
steam-248170.log
Symptoms
The program launches with some icons missing/invisible, as well as using a fallback (?) serif font.
Trying to preview the project by using the F9, F8 or F7 keybinds ("Run Project", "Run Application" and "Run Frame" respectively) fails with the error message "This application has been built with an incompatible version of Clickteam Fusion". This happens regardless of whether the project has been newly created or if it's from an older file (created using the same version, but on Windows, where it works without issue).
Oddly enough, the program seems to be able to build .EXE files perfectly fine. Given that previewing the project (theoretically) uses the same mechanism, it's a bit of a mystery as to why this happens.
Reproduction
You can also try to build the program with the command under the File menu, which should result in the program successfully exporting an .EXE file.