Error: Task cannot start with the word "start"

[krzyklo]

When my task list in Vim is started with the word "start" I get following error.
I do not get error when I use capital "Start".

Task list:
== Plan wk3-4 || project:ssdsd==

• recipe sdfds sddd for coatsdsdfsdfsdsdfsdsdf sdfsdfsfdfor
• start sth

Error:
Error detected while processing BufWrite Auto commands for "*.wiki": Traceback (most recent call last): File "<string>", line 1, in <module> File "/home/kk/.vim/plugged/taskwiki/taskwiki/errors.py", line 26, in wrapped_function original_function(*args, **kwargs) File "/home/kk/.vim/plugged/taskwiki/taskwiki/decorators.py", line 10, in wrapped_function original_function(*args, **kwargs) File "/home/kk/.vim/plugged/taskwiki/taskwiki/main.py", line 60, in update_to_tw c.save_tasks() File "/home/kk/.vim/plugged/taskwiki/taskwiki/cache.py", line 206, in save_tasks task.save_to_tw() File "/home/kk/.vim/plugged/taskwiki/taskwiki/vwtask.py", line 267, in save_to_tw self.task.save() File "/usr/local/lib/python3.6/dist-packages/tasklib/task.py", line 415, in save self.backend.save_task(self) File "/usr/local/lib/python3.6/dist-packages/tasklib/backends.py", line 346, in save_task output = self.execute_command(args) File "/usr/local/lib/python3.6/dist-packages/tasklib/backends.py", line 297, in execute_command raise TaskWarriorException(error_msg) tasklib.backends.TaskWarriorException: TASKRC override: /home/kk/.taskrc Configuration override rc.confirmation:no Configuration override rc.dependency.confirmation:no Configuration override rc.recurrence.confirmation:no Configuration override rc.json.array:off Configuration override rc.bulk:0 Configuration override rc.context: The expression could not be evaluated.

[krzyklo]

I am not sure whether it is vimwiki error or vim-taskwarrior?