As suggested I am testing SPPB 4 update on a local server. I updated the component via the v3.88 upgrade path to v4.01, and everything seems ok on the editor page. However when I switch to page preview or open the fron end of the site I get the following php error:
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 6763976 bytes) in C:\wamp64\www\THEO\components\com_sppagebuilder\parser\addon-parser.php on line 899
Not sure where to go from here??