Resolved Is SP Pagebuilder Pro 2.5.4 compatible with Joomla 3.9?

Hi,
in theory it should be.
But as you know, v2.x is not developed and supported anymore.
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We improve & fix only v3.x.
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Make backup, update and test.

I did an upgrade to PB PRO 3.3.4 and have problems. Be carefull and test locally!

Problem: grey window when trying to edit the Addon!

Joomla 3.9
Pagebuilder PRO 3.3.4

In many cases it's related with :
1) old version of module used there
2) addon override from template
3) old or too fresh version of JCE (use 2.6.31 !!)

In many cases it's related with :

1) no
2) no
3) no

I've did some testing. Even on PB PRO 2.5.4 I can't edit Addon.

Could it be a localhost problem?

Test configuration in Wampserver:
- Akeeba restore from live site
- Joomla 3.8.13 and Joomla 3.9
- PHP 7.0 and PHP 7.1
- Page Builder Pro 2.5.4 and Pro 3.3.4

hard to say, for sure we can help only on hosting, not on localhost.
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ufff...