HI Krisian,
Sorry that you are facing this issue. However for me to help I would like some more info from you please.
Can you tell me..
1. Do you have the latest version of OIC Management GPTools? There was a release a few days ago.
2. What is your version of ArcGIS Pro?
3. What is your version of Portal?
In addition to that.. if you look in c:\Image_Mgmt_Workflows\OrientedImagery\logs you will find xml files that begin with PublishOrientedImageryCatalog followed by a date suffix. Please send me the log file that corresponds to that date that you faced this error. If you are not sure you can open the log and see the error messages and send me the correct one.
As a last test to rule out that there is anything wrong with the actual OIC file that you are trying to publish.. you can drag and drop the OIC file in JSONLint - The JSON Validator \or any similar site or utility that you are comfortable with. I just need to be sure that the json structure of the OIC file is proper.
Looking forward to your reply.
Randall