Dragons Advocate

I have had the same or at least a similar issue after updating from 6.9.2 --> 6.12.4: Pressing "Start" on any container in the docker tab did nothing, but on the docker panel on the dashboard it worked. With the browser console open, I noticed that a JavaScript error was thrown, mentioning "Docker folders". After I uninstalled the "Docker Folder" plugin I used previously, it worked again.

Same here, deactivating Brave Shield fixed this. BUT: Can we please agree that disabling security features just to fix a cosmetic bug is NOT acceptable? I am more interested in what caused the issue in the first place, that security shields could have caused this? Is there some weird loading order that tries to get fonts from external sites or something like that?

There seems to be a bug in the implementation, that effects how environment variables from the docker are read. To be specific, it seems to affect MAILDEV_OUTGOING_SECURE and MAILDEV_AUTO_RELAY, as these are supposed to be set without value. Both of which are only relevant when one tries to use Maildev as an auto-forwarder -- this is broken currently. There are fix suggestions on the Github, but maintenance seems to be slow. I fixed it for myself by forking the repo and applying this fix myself: https://github.com/maildev/maildev/issues/315#issuecomment-896906760