So last night after working on a project all weekend my unity crashed, losing all my terrain but keeping the rest of the assets.
I went to sleep and then to work. Coming home I tried to launch the project. It failed…
My upm readings are:
{“level”:“info”,“message”:“Starting Server”,“timestamp”:“2019-10-07T19:19:28.757Z”}
{“level”:“info”,“message”:“Server started on port [49266]”,“timestamp”:“2019-10-07T19:19:28.761Z”}
{“level”:“info”,“message”:“Health Request received”,“timestamp”:“2019-10-07T19:19:28.969Z”}
{“level”:“error”,“message”:“[Unity Package Manager (Upm)]\nParent process [12368] was terminated”,“timestamp”:“2019-10-07T19:20:04.815Z”}
It seems to launch to the end of the download here in this image then stops: 
Does anyone know the solution? What other information do you need? Thanks!