Is the wrong version installed? Run npm i --production to ensure the proper composer version is installed.
Otherwise, perhaps the issue has been fixed in a newer version of NodeBB... what commit are you on?
i installed new themes (based at persona) and deleted it.
And now at my theme list i see 2 persona themes instead of one.
If i delete persona theme - remains only 1 persona theme at theme list BUT i cant activate it.
I tried to see folders at node_modules and i dont see any persona theme.
When i copy persona theme from my PC into node_modules - FTP send me alert that some files in nodebb-theme-persona exists (rewrite it?)
But this folder DOES NOT exist.
How i can delete persona theme and install without duplicate?
Here my theme list.