Tools all become 'locked' requiring reboot (of Illustrator, not OS)
Windows 10, March 2018 Illustrator (latest).
This has happened maybe five or six times now, I think only since the latest update, apparently random occurrence (or I can't spot a common theme). Working on an unlocked layer, all drawing tools get a 'not available' symbol next to them. Can select objects in the layers panel but nowhere else. The only fix is to restart Illustrator - just closing and reopening the document (or indeed another document) does not unlock the tools.
Please accept my sincere apology for the inconvenience. Please get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html . Since this is not a generic issue that we can reproduce at our end, we will need someone to look into your machine to figure out what is going on here.
Thanks & Regards,
Raghuveer Singh