i know this was the old topic, but might someone else still have this problem until now, just like me.
i've installed ProcessMaker Community Edition Ver. 3.4.9 by Bitnami, on My Windows 10 OS, and everything is running well.
then i try ProcessMaker Mobile Apps on Android.
i set the server to my local Server IP Addrees, like this :
"http://192.168.9.100" and workflow name is right.
but i get this error:
"Connection Error, file cannot be uploaded" or
"A server with the specified hostname could not be found"
someone can help us?