Hi @meE95HT ,
Thank you again for sharing the log files!
As I took a look at the logs, at this time it seems like this could be related to anti-virus or firewall issue.
20190203T201541 W Login - Empty login url, no time settings difference, possibly caused by firewall issues. HttpCode: 0
20190203T201541 I login end 0
20190203T201541 E login failed 5.53553
If you are using an anti-virus or firewall program, can you please review this article to see if Fusion 360 executables were added to the whitelist in your anti-virus software settings?
Also, if you are using a proxy server, please check this and see if this helps.
Hopefully this helps.
If you have any questions, please let me know!
Thanks.