3318913 - Error 'Undefined could not be loaded' when opening script or script collection in Cloud Integration

When trying to open a groovy script or an XSLT script or a script collection in Cloud Integration, following error pops up:

'undefined could not be loaded'

This error occurs intermittently and sometimes regardless the browser or pc.  The error does not occur all the time, sometimes same user on same client PC and browser can open the scripts. 
Same can be observed by opening the script via the Resources Tab. Download of the script works fine. After downloading, the script looks good, it is not corrupted.

SAP Cloud Integration 

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