thanks @BabakBabak updated Stackable - Gutenberg Blocks (Premium) with a new update entry:
Stackable v3.9.0
Read the rest of this update entry...
getting below error while updating (add 3.9.0 as new plugins and old version(3.8.1) is already installed.
and two different instance of Stackable - Gutenberg Blocks (Premium) showing with updated one (3.9.0) can't be activated although existing one is working fine! so waiting for update to come!
The integration process has been interrupted. An error has occurred (true). Please try again later or contact our support team.
Plugin could not be activated because it triggered a fatal error