FinRL Erroreneous

Received two errors trying to run main.py under FinRL

**1) Failed download:**
- AXP: No data found for this date range, symbol may be delisted

**2) ValueError: wrong time_interval**
Traceback (most recent call last):
File "/Users/*/FinRL/finrl/main.py", line 149, in
raise SystemExit(main())
File "/Users/*/FinRL/finrl/main.py", line 68, in main
train(
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/finrl/train.py", line 35, in train
data = dp.add_vix(data)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/finrl/meta/data_processor.py", line 62, in add_vix
df = self.processor.add_vix(df)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/finrl/meta/data_processors/processor_yahoofinance.py", line 263, in add_vix
vix_df = self.download_data(["VIXY"], self.start, self.end, self.time_interval)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/finrl/meta/data_processors/processor_yahoofinance.py", line 84, in download_data
time_interval = self.convert_interval(time_interval)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/finrl/meta/data_processors/processor_yahoofinance.py", line 77, in convert_interval
raise ValueError("wrong time_interval")
ValueError: wrong time_interval