Plugin conflicts with UpdraftPlus

I have the same conflict that @resrutt reported over a year ago.
I just found out while trying to recover a problem at a client that since I installed your plugin, Updraftplus doesn’t work anymore (scheduled and manual backups)!
The symptoms: Updraftplus is displayed normally but scheduled backups are not done and if I want to do a manual backup, the window to launch it is grayed out.
There are no errors displayed, even in the developer console.