Mobile Studio not loading due to an error "Cannot read property 'label' of undefined"Issue <!-- div.margin { padding: 10px 40px 40px 30px; } table.tocTable { border: 1px solid; border-color: #e0e0e0; background-color: #fff; } .title { color: #d1232b; font-weight: normal; font-size: 28px; } h1 { color: #d1232b; font-weight: normal; font-size: 21px; margin-bottom: 5px; border-bottom-width: 2px; border-bottom-style: solid; border-bottom-color: #cccccc; } h2 { color: #646464; font-weight: bold; font-size: 18px; } h3 { color: #000000; font-weight: bold; font-size: 16px; } h4 { color: #666666; font-weight: bold; font-size: 15px; } h5 { color: #000000; font-weight: bold; font-size: 13px; } h6 { color: #000000; font-weight: bold; font-size:14px; } ul, ol { margin-left: 0; list-style-position: outside; } --> When trying to launch the mobile studio you would see an error "Cannot read property 'label' of undefined" ReleaseMadrid onwardsCauseOne of the relationships on the Related List records had been configured to a Field not available in the customer instanceResolutionFind the related list record associated with the main screen record and open its map record. Once you find the affected [sys_sg_master_detail_screen]Navigate to the related list and open the Main data record From the main Data record, You would see all the available screens on the related listSelect Related List recordIn the selected Related List record, You would see 3 different "Related List Mappings" recordsOpen each one of them and check its XML value for the "Relationship" field and the actual display value for the "Relationship" field. If the reference is invalid it will select the first value on the choice list.Fix the Relationship field and the issue should be resolved