First of all thanks for choosing our Theme, we are glad to be you in the WoodMart WordPress family :-).
I have tried to log in to your website but was unable to login. Please provide me with the correct admin panel login details to check it myself and help you out accordingly.
I saw the screenshot you attached. Please make sure that there are no items added in the categories as you mentioned. Then clear the cache and check back.
If the problem continues then deactivate all the third-party plugins, activate the parent theme, and tell me then we will troubleshoot the issue with theme plugins.