RuntimeError: generator raised StopIteration

[ishandutta2007]

import giphypop
g = giphypop.Giphy()

/Users/ishandutta2007/Documents/Projects/Google-Search-API_exmaple/env/lib/python3.7/site-packages/giphypop.py:241: UserWarning: You are using the giphy public api key. This should be used for testing only and may be deactivated in the future. See https://github.com/Giphy/GiphyAPI.
warnings.warn('You are using the giphy public api key. This '

results = [x for x in g.search('burj khalifa')]

Traceback (most recent call last):
File "/Users/ishandutta2007/Documents/Projects/Google-Search-API_exmaple/env/lib/python3.7/site-packages/giphypop.py", line 321, in search
raise StopIteration
StopIteration

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "", line 1, in
File "", line 1, in
RuntimeError: generator raised StopIteration