Hi Kovah, thank you for you help.
I downloaded again Invoiceplane 1.5.5 and overwritten the assets/invoiceplane/css folder, but still I’m getting the same error.
Here there is the list of files and permissions I’ve in that folder:
XXX$ ls -l
-rw-r–r--@ 1 XXX staff 104 29 Ott 11:01 monospace.css
-rw-r–r--@ 1 XXX staff 204 29 Ott 11:01 reports.css
-rw-r–r--@ 1 XXX staff 206509 29 Ott 11:01 style.css
-rw-r–r--@ 1 XXX staff 1326 29 Ott 11:01 templates.css
-rw-r–r--@ 1 XXX staff 124468 29 Ott 11:01 welcome.css
If this error occures to me only, since I found out I need the italian version of Invoiceplane, it could be ignored: maybe something went wrong in my MAMP stack, I don’t know. The italian version runs perfectly.
But still, if you need some help for debugging, I’m waiting to uninstall this version of Invoiceplane.