I am new to learning Python for GIS. I am currently trying to create a script which creates a new geodatabase, then using a list, iterates through the features of an existing geodatabase and exports these features to the new geodatabase I just created earlier in the script. I have ended up receiving the error "TEST_GDB (the new created geodatabase) does not exist or is not supported" multiple times. I researched my problem, and got the closest to a solution at this link Using geodatabase feature dataset created in ArcPy script as output/input location later on in same script? however I am still receiving the same error. It is worth noting that existing geodatabase from which I am exporting the data from is a default geodatabase for an ArcGIS Pro project.
import arcpy # set initial environments arcpy.env.workspace = r"C:\Users\My_Name\Documents\GIS\ODU_Home\PYTHON_ODU\Python_Script_Tool_Test\Python_Script_Tool_Test.gdb" arcpy.env.OverwriteOutput = True # create a list for all feature classes within old or existing geodatabase OldData = arcpy.ListFeatureClasses() print("Features Listed") #Initialize variables to use in CreateFileGDB tool out_folder_path = r"C:\Users\My_Name\Documents\GIS\ODU_Home\PYTHON_ODU" out_name = "Test_GDB" # create a new geodatabase & set as new workspace GDB = arcpy.CreateFileGDB_management(out_folder_path, out_name,) print("New .gdb created") ws = str(str(GDB) + "\\") arcpy.env.workspace = ws print("New Workspace") exportList =  print("New list initialized") #export feature classes from old gdb to new gdb for Old in OldData: arcpy.FeatureClassToGeodatabase_conversion(Old, r"C:\Users\My_Name\Documents\GIS\ODU_Home\PYTHON_ODU\Test_GDB") exportlist.append(Old + "_NEW") print("Existing Feature Classes Exported")