Hi,

my commands look like these:

kimai start --customer 'Customer-X' --project 'Project X' --activity 'Training/Study' --description 'Any description' --tags ''

Please note the different String Parameter:

• customer uses a dash, which is working
• project uses a space, which is also working
• activity uses a slash which results in a error 400 - Bad request
  

However this is working:

kimai start --customer 'Customer-X' --project 'Project X' --activity '10' --description 'Any description' --tags ''

I switched from activity 'Training/Study' to '10', the ID of this activity -> This is working. Other activity string-parameter like 'Meeting' or 'Docs' is also working

Kimai Version:
Kimai 2 - 1.7 stable (Ayumi) by Kevin Papst and contributors.
Kimai 2 - Remote Console version 0.3.3 2020-01-27 17:22:30 UTC (#5546282)

OS:
DISTRIB_ID=ManjaroLinux
DISTRIB_RELEASE=20.0.3
DISTRIB_CODENAME=Lysia
DISTRIB_DESCRIPTION="Manjaro Linux"