I don't think you can. You can open a Web Form using a microflow, but there is no feature that I am aware of any capability that allows you to do this.
Not sure how the error you mention is related. Could describe a bit more about what is on your form?
actually i have solved it by deleting the control bar. now my question could we change the name of a tab using a microflow ?
No, tab names can't be dynamically changed. You could have 2 tabs, and hide or show a different one based on attributes or user roles. This would make it seem like the tab name was changing to the user....