I'm still having the same issue and now on SP Pagebuilder 5.34.
My PHP settings are
memoryLimit 1536M
uploadMaxFilesize 256M
All other media managers on my site are working except Pagebuilders.
Note
It seems with each update there are more issues created to my website's.
Unfortunately I am left with the no option but to find/wait till a version of Pagebuilder works and functions
properly for my websites without creating any othe issues and stop updating.
My workload is too full to have to deal with new issues each time there is an update.
Without proper beta testing and releases that are left for the customer to sort out the bugs and issues that arise
I feel my subscription will also not be renewed.