Hope you are doing great! Were you able to solve this issue?
Actually I am also having some relatively same issues. Though I was able to add tab in the Patient Dashboard but because of this few of the rest of the tabs have stopped working e.g visits and FormEntry.
Like below is the screenshot for Visits tab which is not displaying the table data.
This is the screenshot for FormEntry which is having some empty space that keeps on Loading.
I would be very thankful if you could be of some help. Because I'm new to OpenMRS module development and have no clue what is causing this problem.