I updated my modified install script to original version 0.2.5 and replaced vext.gi with pygobject. On Ubuntu 18.04 (64) it works fine (sorry, no time to test other OS).
Link to diff page on Github: https://github.com/palto42/rapid-photo-downloader/commit/1ec020815d3684bb399a4c2e067e10e1fd4ac9b0#diff-9de40ef13f0271a46b14b8c27bbf004d
I updated my modified install script to original version 0.2.5 and replaced vext.gi with pygobject. On Ubuntu 18.04 (64) it works fine (sorry, no time to test other OS).
Link to diff page on Github: https:/ /github. com/palto42/ rapid-photo- downloader/ commit/ 1ec020815d3684b b399a4c2e067e10 e1fd4ac9b0# diff-9de40ef13f 0271a46b14b8c27 bbf004d