Panic when creating a card

[DaniruKun]

When calling zube card create, it panics with the following trace and input values:

? Project: Platogo
? Workspace: server-planning
? Title? Explore using functional lenses in Elixir projects
? Description? [Enter to launch editor] Waiting for Emacs...
? Description? <Received>
? Choose labels: friday, research, refactoring
? Assignees:
? Epic: None
? Github source: None
? Priority: None
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0x13e4d04]

goroutine 1 [running]:
github.com/platogo/zube-cli/zube.(*Client).performAPIRequestURL(0xc00012a420, {0x14ad8f0, 0x4}, 0xc00028c5c0?, {0x1573ec0, 0xc0001db0e0})
	/Users/dpetrovs/projects/git/platogo/zube-cli/zube/client.go:363 +0x7c4
github.com/platogo/zube-cli/zube.(*Client).CreateCard(_, _)
	/Users/dpetrovs/projects/git/platogo/zube-cli/zube/client.go:189 +0x1c5
github.com/platogo/zube-cli/cmd.glob..func2(0x180ca20?, {0x14ad9f0?, 0x0?, 0x0?})
	/Users/dpetrovs/projects/git/platogo/zube-cli/cmd/card_create.go:155 +0x1745
github.com/spf13/cobra.(*Command).execute(0x180ca20, {0x18480a0, 0x0, 0x0})
	/Users/dpetrovs/go/pkg/mod/github.com/spf13/cobra@v1.4.0/command.go:860 +0x663
github.com/spf13/cobra.(*Command).ExecuteC(0x180d420)
	/Users/dpetrovs/go/pkg/mod/github.com/spf13/cobra@v1.4.0/command.go:974 +0x3bd
github.com/spf13/cobra.(*Command).Execute(...)
	/Users/dpetrovs/go/pkg/mod/github.com/spf13/cobra@v1.4.0/command.go:902
github.com/platogo/zube-cli/cmd.Execute()
	/Users/dpetrovs/projects/git/platogo/zube-cli/cmd/root.go:29 +0x25
main.main()
	/Users/dpetrovs/projects/git/platogo/zube-cli/main.go:9 +0x17

Investigate why this happens.