Version 4.5.6.b included an enhancement in data extraction permissions so only Administrative roles (or roles with a hierarchy level of 200) can pull all data. This was due to user feedback over time indicating some users need to export data, but should only have access to specific datasets.
There are two options:
1. Set up extracts FOR specific user roles in the Data Extracts By Form section. There, you can target exports to specific roles who should have access.
2. Alternatively, you can change the role's hierarchy level to 200 in the role security section of study settings. That would give them back access to all data and the ability to define their own extracts.