Save-Button doesn't react when Duplicating

[JumpingDroplets]

Issue:

using the webapp, the Save button doesn't react when Duplicating a calender entry from one calender to another (same account).

Steps/replicate:

1. open webapp (https://pim.etesync.com/)
2. select entry
3. click duplicate-button
4. clicking the drop down menu "saving to"
5. change calender to another one
6. click save button bottom right (no reaction/does nothing/site stays the same and no new date is saved)

Console Message on Step 6

2:39:32.532 Uncaught (in promise) TypeError: A is undefined
    e https://pim.etesync.com/static/js/main.aaa47d55.chunk.js:1
    c https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    _invoke https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    y https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    r https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    A https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    i https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    i https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    sa https://pim.etesync.com/static/js/main.aaa47d55.chunk.js:1
    e https://pim.etesync.com/static/js/main.aaa47d55.chunk.js:1
    c https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    _invoke https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    y https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    r https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    A https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    i https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    i https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    F https://pim.etesync.com/static/js/main.aaa47d55.chunk.js:1
    value https://pim.etesync.com/static/js/main.aaa47d55.chunk.js:1
    A https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    h https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    I https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    I https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    at https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    it https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    At https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    ht https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    N https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    H https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    Zt https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    Xt https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    unstable_runWithPriority https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    Ui https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    R https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
    Vt https://pim.etesync.com/static/js/2.33caf9b7.chunk.js:2
main.aaa47d55.chunk.js:1:187508

Additional:

• it does work when duplicating within the same calender
• cancel and delete buttons work
• issue observed in Firefox (with and without addons) and Edge (no addons)

Intended use: transferring dates/entries from one calender to another