I have created a Webpage and added a cover block. After 10 Minutes, I wanted to edit the page further, by dragging ANY block to the page this error occurs and breaks the editor…

Please Help!

I have have the Current Nightly Build Odoo 15

Odoo 15.0-20211019 (Community Edition)

UncaughtPromiseError
Uncaught Promise > cannot call methods on droppable prior to initialization; attempted to call method 'destroy'
Error: cannot call methods on droppable prior to initialization; attempted to call method 'destroy'
error@\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:1345\:130\\
\ \ \ \ \$\.widget\.bridge\/\$\.fn\[name\]\/\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:2000\:24\\
\ \ \ \ each\@\\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:1348\:170\\
\ \ \ \ each\@\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:1339\:192\\
\ \ \ \ \$\.widget\.bridge\/\$\.fn\[name\]\@\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:1999\:327\\
\ \ \ \ stop\@\https\:\/\/odoo\.stakdek\.de\/web\/assets\/348\-23e5fa0\/1\/web_editor\.assets_wysiwyg\.min\.js\:1583\:46\\
\ \ \ \ _onSmoothDragStop\@\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:4997\:1050\\
\ \ \ \ stop\@\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:4977\:949\\
\ \ \ \ _trigger\@\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:2027\:75\\
\ \ \ \ _trigger\@\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:2166\:36\\
\ \ \ \ \$\.widget\/\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:1997\:159\\
\ \ \ \ _mouseStop\@\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:2099\:373\\
\ \ \ \ \$\.widget\/\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:1997\:159\\
\ \ \ \ _mouseUp\@\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:2076\:6\\
\ \ \ \ \$\.widget\/\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:1997\:159\\
\ \ \ \ _mouseUp\@\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:2102\:38\\
\ \ \ \ \$\.widget\/\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:1997\:159\\
\ \ \ \ _mouseDown\/this\._mouseUpDelegate\@\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:2071\:123\\
\ \ \ \ dispatch\@\\\\\\\https\:\/\/odoo\.stakdek\.de\/web\/assets\/344\-e5acee4\/1\/web\.assets_common_lazy\.min\.js\:1649\:447\\
\ \ \ \ add\/elemData\.handle\@\https://odoo.stakdek.de/web/assets/344-e5acee4/1/web.assets_common_lazy.min.js:1635:166