I recently updated my Kicad installation to the latest stable version.
I created a design for a proof of concept and decided to autoroute most of tracks (because most of my tracks are for low speed signals).
After importing the spectra session, I checked the connections and wanted to adjust some tracks. But it seem that draging 45° refuse to work. And routing by hand let appear an error message about routing inside
Moreover, when I want to drag without 45° constraint, strange green lines appear. Like there is borders everywhere.
I tried to suppress every lines Edge Cuts and I can route normally. But I would like to keep the edge cuts I prepared earlyer because it’s a complex form.
Run DRC it will give you more information. (As you describe a problem with edge cut you might have an invalid edge outline or are affected by the bug https://bugs.launchpad.net/kicad/+bug/1826270)
I finally re-intalled Kicad 5.1.0-1 because this bug didn’t happened with this verison. Now everything work like a charm. I will wait for this bugfix to be released in a future version.
Since my problem is very similar to the bug report Rene suggested and it status is “Fix commited”, I assumed like craftyjon said that this bug will be fixed in the next version.