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Layer not displayed in chrome Cross-Origin Read Blocking (CORB)

Question asked by on Aug 19, 2019
Latest reply on Aug 22, 2019 by

Layer not displayed in chrome


ArcGIS Enterprise 10.7.1 

Browser: only in Chrome

Chrome version:  Version 76.0.3809.100 (Official Build) (64-bit)


When viewing maps from the <portal> a rest/services json call to the <web adaptor> is blocked 




Chrome devtools console displays the following error:

Cross-Origin Read Blocking (CORB) blocked cross-origin response https://<web adaptor>/arcgis/rest/services/<map>/MapServer/export?<params> with MIME type application/json


Because this request is blocked I don't easily see what the response header are.


I can see other rest calls returning data that include the following response headers:


https://<web adaptor>/arcgis/rest/services/<map>/MapServer?f=json

X-Content-Type-Options: nosniff, nosniff
Content-Type:  application/json;charset=UTF-8