form th:action not working using thymeleaf and spring - spring

Question

i am new in spring and thymeleaf, i am trying to submit a form, insert to database, but whe i am using form submission with submission it simply redirects to page and don't invoke to controller
i don't know why,
please, help
here is my Controller
#Controller
public class AdminController {
#Autowired
private CategoryServiceImpl categoryService;
#GetMapping("/adminPage")
public String index(){
return "adminPage";
}
#GetMapping("/categoryList")
public String showCategory(){
return "categoryList";
}
#GetMapping("form")
public String categoryForm(Model model, Category category){
model.addAttribute("category", category);
// model.addAttribute("add", true);
// categoryService.create(category);
return "admin/categoryForm";
}
#PostMapping("create")
public String addOrgCategory(#Valid Category orgCategory) {
categoryService.create(orgCategory);
return "redirect:/categoryList";
}
my html form is here
<form action="#" th:action="#{/create}" th:object="${category}" method="POST">
<div class="form-group">
<label for="name" class="text-dark font-bold">Category name</label>
<input id="name" type="text" class="form-control" th:value="${category} ? ${category.name} : ' '" th:field="*{name}">
</div>
<div class="form-group">
</div>
<button
type="submit" class="btn btn-success" data-toggle="tooltip"
data-placement="top" title="Tooltip on top">Create
</button>
</form>