Can't Sign in to Fusion 360

[forfusion2019]

Hello,

I know that many sign in issue have been posted in the forums i read the most of it and none worked for me .. i will tell you what is happening with me in details.

I had MacOs Sierra and everything was working normally but i upgraded to high sierra to get the most updated versions of Fusion 360 and after that update, the fusion was stuck in offline mode and i didn't find the sign out button. i read some fixing issues on the forums and they told to delete Loginstate.xml from web services folder, i did that, from that point it's showing me that " cannot connect to internet.... i will attach a screenshot" i install fusion on a windows PC (on the same Network) and its working fine.

i tried to connect to some links:

https://developer.api.autodesk.com/authentication/v1/exchange

it's giving me :

developerMessage	"The requested resource does not exist."
moreInfo	"https://forge.autodesk.c…rs_guide/error_handling/"
errorCode	""

i tried to connect to links mentioned in the log files

https://ui-dls360.autodesk.com/fusion/version.txt

it's giving me

ZipFilename:fusionsrcv1102.zip
BuildVersion:v1102
BuildDate:02/20/2018
Service:FusionJS

i also did a clean uninstall/reinstall of fusion as told on the forums and didn't work also

i will attach the log files with the screenshot

any help will be highly appreciated

Many Thanks