Line chart doesn't work

I just create a question consist by month and number and visualize them into line chart. I’ve already save the question and apply it to dashboard but turns out the visualization change into table. Then I change the visualization again into chart, but the questions change it self to table over and over again.

Hi @alice, please remember that is very difficult to help you if you don’t post any information about the context where this is happening. Version of Metabase? Browser? Any logs? Troubleshooting info? Thanks :smiley: