Multiple buttons/options not working inside Dashboard

Hi

I have the Pro version, but ever since migrating site to new host a lot of back-end functionality is not working.

For example, when trying to add a Marker Description Image to a listing by ‘Upload Image’ – I get this error
Fatal error: Uncaught Error: Call to undefined method GMWDViewMarkers_gmwd::display() in /home1/csionli1/public_html/staging/wp-content/plugins/wd-google-maps/admin/controllers/GMWDController.php:75 Stack trace: #0 /home1/csionli1/public_html/staging/wp-content/plugins/wd-google-maps/admin/controllers/GMWDController.php(51): GMWDController->display() #1 /home1/csionli1/public_html/staging/wp-content/plugins/wd-google-maps/gmwd_admin_class.php(155): GMWDController->execute() #2 /home1/csionli1/public_html/staging/wp-includes/class-wp-hook.php(298): GMWDAdmin->gmwd(”) #3 /home1/csionli1/public_html/staging/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(”, Array) #4 /home1/csionli1/public_html/staging/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #5 /home1/csionli1/public_html/staging/wp-admin/admin.php(222): do_action(‘toplevel_page_m…’) #6 {main} thrown in /home1/csionli1/public_html/staging/wp-content/plugins/wd-google-maps/admin/controllers/GMWDController.php on line 75

Other things don’t work either. If I want to change the marker, I click “Choose Marker Image” and I get the modal box for icons, and the icons appear, but I can’t do anything with them. There’s no “OK” or “Select” or whatever button/action to actually set my choice.

If I want to edit my description, clicking “Open Editor” does nothing. Nothing opens, no action takes place when I click.

What’s going on?
Thanks