the problem was solved by manually adding the engine to the binary space, followed by extraction into the level. It's probably worth pointing out as an alternative.
Viewing post in Spine Extension for Clickteam Fusion 2.5 comments
Registration in the binary space is a necessary thing.
And although the binary data was to be extracted without an extraction instruction (the extraction instruction is executed inside the Extension)
The extraction function was not working well depending on the environment.
(I believe this has been fixed in the 20231116 version)
Thanks for the report.