Hey Irwin,
it seems like you hitting this error :
Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 72 bytes) in /home/prospert/public_html/administrator/components/com_easyblog/setup/controllers/install.post.php on line 629
I try to run this query in your database, then I get this huge records on this table
7078351 (I believe these huge records is stored since you using Easyblog version from 3.x until now)
SELECT count(*) FROM spc_easyblog_acl_group
The reason why the installation you stuck at this step is because it will go through all the single record from this acl group table, so hitting time up error.
To fix this, I already truncate this table, then I re-run installation again, it work fine now.
After updated completed, then I go to your ACL > select all the user group > then re-save again, so it will generate the latest data in this table `#__easyblog_acl_group`, everything is work fine now.