Look to me, to be very much like someones messed with an S3 Bucket Structure or Permissions

https://pega-academy-images.s3.amazonaws.com/te-content/choose_file.png  returns

<Error>
<Code>NoSuchKey</Code>
<Message>The specified key does not exist.</Message>
<Key>te-content/choose_file.png</Key>
<RequestId>5589C7E11EE745DF</RequestId>
<HostId>
D2X8mFIkjvZM4Yx4JlovGL0keLUe9JlR0J7BLj1JgvqGwMHS1TmGKafqS+pFHRmQyqIdYTVk3cY=
</HostId>
</Error>

https://pega-academy-images.s3.amazonaws.com/ returns

<ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
<Name>pega-academy-images</Name>
<Prefix/>
<Marker/>
<MaxKeys>1000</MaxKeys>
<IsTruncated>false</IsTruncated>
<Contents>
<Key>Pega Robot Manager Course PA 1.0/</Key>
<LastModified>2019-12-16T16:13:13.000Z</LastModified>
<ETag>"d41d8cd98f00b204e9800998ecf8427e"</ETag>
<Size>0</Size>
<StorageClass>STANDARD</StorageClass>
</Contents>
<Contents>
<Key>
Pega Robot Manager Course PA 1.0/Adding and editing runtime configuration files/
</Key>
<LastModified>2019-12-16T16:13:13.000Z</LastModified>
<ETag>"d41d8cd98f00b204e9800998ecf8427e"</ETag>
<Size>0</Size>
<StorageClass>STANDARD</StorageClass>
</Contents>
<Contents>
<Key>
Pega Robot Manager Course PA 1.0/Adding and editing runtime configuration files/1.png
</Key>
<LastModified>2019-12-16T16:13:14.000Z</LastModified>
<ETag>"91a68ecde06a1b70483076814716105f"</ETag>
<Size>17747</Size>
<StorageClass>STANDARD</StorageClass>
</Contents>

https://pega-academy-images.s3.amazonaws.com/Pega%20Robot%20Manager/Pega%20Robot%20Manager%20Course%20PA%201.0/Scheduling%20Robots%20for%20work/5.jpg Returns

<Error>
<Code>AccessDenied</Code>
<Message>Access Denied</Message>
<RequestId>209C60D16C03B345</RequestId>
<HostId>
CotWdwkunUfQX+Yx8p+9oiBdWJIa0wF8N9dDV9mxJngXteoxeYedqtf1Ygu7PM7DzJmHZ1UguUw=
</HostId>
</Error>

Not that this really helps anyone specifically, but it doesn't sit comfortably for me that things in Pega can get Broken so easily ?

Certainly doesn't hep me get my training finished.