module 'pystac_client' has no attribute 'ItemCollection'

[Rudigithub12345]

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Hi

I run this example https://planetarycomputer.microsoft.com/docs/tutorials/cloudless-mosaic-sentinel2/ and i found following error:

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AttributeError Traceback (most recent call last) Cell In[23], line 1 ----> 1 signed_items = pystac_client.ItemCollection([ 2 planetary_computer.sign_assets(item) for item in items 3 ]) 4 #print(signed_items) 5 data = ( 6 stackstac.stack( 7 items, (...) 13 .assign_coords(band=lambda x: x.common_name.rename("band")) # use common names 14 )

AttributeError: module 'pystac_client' has no attribute 'ItemCollection'

How to solve this problem?