Yes, stop using PFM as its not being developed for a long time and start using Rusted Pack File Manager.

Ok thanks, I didn't know ^^

Sorry if this is a stupid question but how do I open esf files with RPFM? It was automatic with PFM. Also, I can't seem to upload my mod : when I try to (through the troy mod manager, after clicking on the blue folder) it keeps running but nothing gets sent.

How large is your mod file and is there maybe already a mod with the same name on the workshop?
(not sure it is required by now, but did you add a mod picture to the file)

Thanks. Yup, the picture was missing. I assumed I could add one after the upload ;) The only question remaining is how to open esf files in RPFM ? :)