Zotero 7: Deleting a profile results in an error

When I try to delete a second profile I created, I get the following error:

this.init@chrome://zotero/content/xpcom/zotero.js:238:5
ZoteroService@jar:file:///Applications/Zotero.app/Contents/Resources/app/omni.ja!/components/zotero-service.js:351:23
createInstance@resource://gre/modules/ComponentUtils.jsm:90:19
@chrome://zotero/content/include.js:5:3
@chrome://global/content/commonDialog.xhtml:34:25
openWindowPrompt@resource://gre/modules/Prompter.jsm:1226:17
openPrompt@resource://gre/modules/Prompter.jsm:1115:12
openPromptSync@resource://gre/modules/Prompter.jsm:1046:10
confirmEx@resource://gre/modules/Prompter.jsm:1465:10
confirmEx@resource://gre/modules/Prompter.jsm:305:14
ConfirmDelete@chrome://mozapps/content/profile/profileSelection.js:318:41
oncommand@chrome://mozapps/content/profile/profileSelection.xhtml:1:1
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