Based on your limited description it seems that your ODATA Create/Update request is failing.
There can be multiple reasons for the same. But having worked on similar setups in the past, I believe I can resolve thLisää
Have experience in configuring sap fiori launchpad. Standards applications configuration as well as extension. Developed custom SAPUI5 applications for several modules.
I have worked on major end to end SAP implemenLisää