Issues with Migration - Cannot add foreign key constraint
It looks like your error message is truncated, which makes this a little hard to troubleshoot, so if you can find a way to generate a non-truncated version of this message, I think the solution should be clearer.

That said - I'm looking at a CiviCRM database dump.  The first two tables to be created are civicrm_acl and civicrm_acl_cache.  Your error references civicrm_acl - but civicrm_acl doesn't have any foreign key constraints defined, so it makes no sense that you'd get this error on the line in your question.

However, civicrm_acl_cache DOES have a foreign key constraint - on civicrm_acl.  So I would assume that one of the following is true:


Your PHPMyAdmin user doesn't have the permission to create civicrm_acl, or perhaps to insert data into it.
Your database dump you're loading is missing data from civicrm_acl.


Please check the following:


Does civicrm_acl exist after you've imported it? If not, check permissions.
Does civicrm_acl exist but contain no data?  If yes, open your database dump in a text file and ensure that there's a line starting with INSERT INTO `civicrm_acl` VALUES.  That line should be between the lines starting with CREATE TABLE `civicrm_acl` and CREATE TABLE `civicrm_acl_cache` - somewhere right near the top of the file.
If that line DOES exist, you might not have INSERT permissions.
If that line doesn't exist, you should try getting a dump that does.