Same problem.
I just installed the slider on wordpress 5.5. When i try to create a new slider an error occurs : “Oops! You’re trying to save a slider without title.” although i gave a title to slider.
More details:
I tried to override the error by finding the php file that checks if title exists and put that part of code in comments. Then i was able to save the slider but it was ignoring my title. In the sliders list my new slider appeared with an empty title. Then i copied the slider and got a title automatically (title was now ‘2’). The slider now appears in the page but doesn’t show any of the fotos-slides just an empty area and the arrows at the sides.
