File save window for blank.gif pops up when Compose icon clicked

[bobself]

I just installed roundcube on a raspberry pi4 (raspbian) from the package that they provide ( 1.4.3 ). This is also running pihole and uses lighttpd as the web server. Receiving email works fine. But when I click the Compose icon a linux file manager window opens up that shows my Desktop prompting me to save "blank.gif". I can either save it or cancel out of that window and then I'm back to the roundcube composing screen. Also, during installation I chose sqlite as the database in ~/roundcube. Also: I use the Brave Browser to access roundcube from another machine on my LAN.
I was looking in the sqlite datebase:system table:
roundcube-version         2016112200
Does that mean that I am running a 2016 version?

Why is this happening?

[SKaero]

It means your database scheme is out of date, you're running the database scheme from Roundcube 1.3.x and you should update the scheme to the version you're currently using.