“Beautiful Page Building Gutenberg Blocks for WordPress” by Blockspare does NOT function in ClassicPress.
Although the Blockspare Page Editor plugin files for JS and CSS seem properly loaded in the Admin Add or Edit Page source code the Control, a Plus Icon, stays in a hidden state and can’t be seen or clicked to add the Blockspare page blocks.
This observed on Dec. 8, 2020.
Tested on a localhost development Mac laptop with the latest Classipress installation and Blockspare Free plugin.
PHP Version 7.4.9