Welcome to the community, @Sorrathan_Wongsuwan! :grinning_face_with_big_eyes: Just to confirm (I couldn’t get a clear read from your description above), the base does load if you wait long enough, correct? Or are you saying that it never loads no matter how long you wait?
How large is your base? How many records does it contain? I typically only encounter this when accessing very large bases (mostly client bases with 20K+ records in the main table).
You also mentioned your Internet connection. How fast is that connection?