Blank screen while selecting MyList on mobile

[kcloud]

Describe the bug

Initially reported by A&SC staff:

Using the online finding aid while on mobile, a patron could click on view in reading room and add the item to his list. However, the next steps of view list and request in reading room are not available like they are when using a laptop or desktop.

and corroborated with TSS:

This morning I attempted to reproduce the issue using a link to correspondence from the Thomas Parran papers in Safari on an old iPad – I could add the item to My List in DIMES, but did not initially have the yellow “View My List” button in the top right – only something resembling the three horizontal line “hamburger menu” icon – clicking this loaded a DIMES page whose title matched the title of the item I was attempting to request, but the page was otherwise blank. When I navigated back in the browser the “View My List” button was present. I did not experience this issue in Chrome, however.

The issue does not appear in upstream on mobile.

To reproduce

Steps to reproduce the behavior:

1. Select an item from digital.library.pitt.edu and select View in Reading Room on mobile.
2. Select the hamburger menu for the view my list dropdown
3. The screen appears blank
4. Type errors reported in console

Expected behavior

The MyList index of selected items to appear.

Error message or screenshots

TypeError: f[e] is undefined on react-dom.production.min.js:209:194
Uncaught TypeError: f[e] is undefined use-dropdown-menu.js:15:9