Check for console log errors and send them to us
If nothing above helps, in Edge, Firefox, or Chrome you can check for errors with the Error Console.
To do that, open the board in question and use:
F12in Edge and go to the Console tab.
Ctrl + Shift + Jin Firefox or Chrome for Windows.
command + option + Jin Chrome
command + shift + Jin Firefox
You can copy any errors you see there, or take a screenshot and send it to us.