This design requires 260 of such cell types but only 130 compatible sites are available in the target device.

[DRC UTLZ-1] Resource utilization: BIBUF over-utilized in Top Level Design (This design requires more BIBUF cells than are available in the target device. This design requires 260 of such cell types but only 130 compatible sites are available in the target device. Please analyze your synthesis results and constraints to ensure the design is mapped to Xilinx primitives as expected. If so, please consider targeting a larger device.)

Invalid Template 'hello_world' selected for Domain 'standalone_ps7_cortexa9_0'. ERROR: hello_world requires at least one serial hardware instance to be present

[Place 30-494] The design is empty
Resolution: Check if opt_design has removed all the leaf cells of your design. Check whether you have instantiated and connected all of the top level ports.