HI Michael,
Please follow below steps:
1. Upload the latest SAPUI5 library file 1.28.21 as per note 2241967
And apply the steps as mentioned in 2118663 sap note
Run program /UI5/UI5_UPLOAD_PATCH_TO_MIME – Execute and upload the file UI5CLIENT28P_21-80000549.zip in test mode.
There is also patch 1.28.24 available, there is no harm in applying that also. But dont go beyond versions, unless if you are planning to have NW 750. If you want to stay with NW 740 then upload the UI5 libraries to 1.28.21 or 1.28.24.
2. Once test mode is showing up fine results, then proceed with execution mode by unchecking the test mode and putting a Workbench request.
3. Status should be showing Tick mark for all the files.
4. Once it is done, clear the Gateway server cache by running report /UI2/INVALIDATE_GLOBAL_CACHES in execution mode.
Hope this helps.
thanks,
JC