This came up with as me when trying to upload text files (I tested several) using Abrowser (10.0.2), but it seems to be related to one of the Abrowser extensions I use: trying with a clean profile (as well as with Midori and Epiphany) solved the problem.
Marking as closed if you say it works fine now.
seems to work now for me :-)
Trying another png file
testing with a small jpg
Test: Right one.
This time marking the fields.
Test: with no interesting addons enabled.
hmm
testing...
This came up with as me when trying to upload text files (I tested several) using Abrowser (10.0.2), but it seems to be related to one of the Abrowser extensions I use: trying with a clean profile (as well as with Midori and Epiphany) solved the problem.