dkatena

Same error for me, no Block exist.
Maybe some incompatibility?
I’m sure to had it in a test install, but after a while it disappeared.
I haven’t found any way to make it reappear

same error here, have you some block with media or files in the same page?
I think it could be some incompatibility with there.

My error:

_createModes/<@https://[cut]/wp-includes/js/media-views.min.js?ver=5.8.1:2:53705
ka@https://[cut]/wp-content/plugins/wp-chords/dist/bundle.js?ver=1.1.0:9:4740
Gr@https://[cut]/wp-content/plugins/wp-chords/dist/bundle.js?ver=1.1.0:9:39455
_createModes@https://[cut]/wp-includes/js/media-views.min.js?ver=5.8.1:2:53665
initialize@https://[cut]/wp-includes/js/media-views.min.js?ver=5.8.1:2:53074
initialize@https://[cut]/wp-includes/js/media-views.min.js?ver=5.8.1:2:65674
initialize@https://[cut]/wp-includes/js/media-views.min.js?ver=5.8.1:2:82558
h.View@https://[cut]/wp-includes/js/backbone.min.js?ver=1.4.0:2:14140
constructor@https://[cut]/wp-includes/js/wp-backbone.min.js?ver=5.8.1:2:2600
constructor@https://[cut]/wp-includes/js/media-views.min.js?ver=5.8.1:2:36836
O.extend/n<@https://[cut]/wp-includes/js/backbone.min.js?ver=1.4.0:2:23450
O.extend/n<@https://[cut]t/wp-includes/js/backbone.min.js?ver=1.4.0:2:23450
O.extend/n<@https://[cut]/wp-includes/js/backbone.min.js?ver=1.4.0:2:23450
dx5j/wp.media@https://[cut]/wp-includes/js/media-models.min.js?ver=5.8.1:2:8240
m@https://[cut]/wp-includes/js/dist/media-utils.min.js?ver=8e557d69e3ef2356d081c60830d157a1:2:3772
Yg@https://[cut]/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.13.1:68:243
rh@https://[cut]/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.13.1:98:274
zj@https://[cut]/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.13.1:228:490
Th@https://[cut]/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.13.1:152:225
tj@https://[cut]/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.13.1:152:152
Te@https://[cut]/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.13.1:146:151
Pg/<@https://[cut]/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.13.1:61:68
unstable_runWithPriority@https://[cut]/wp-includes/js/dist/vendor/react.min.js?ver=16.13.1:25:260
Da@https://[cut]/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.13.1:60:280
Pg@https://[cut]/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.13.1:61:16
ha@https://[cut]/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.13.1:60:451
Ja@https://[cut]/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.13.1:224:400
ch@https://[cut]/wp-includes/js/dist/vendor/react-dom.min.js?ver=16.13.1:93:81
e@https://[cut]/wp-includes/js/dist/data.min.js?ver=a9e98fe3ad76884fe7909ba8348395b7:2:20891
t@https://[cut]/wp-includes/js/dist/data.min.js?ver=a9e98fe3ad76884fe7909ba8348395b7:2:20958
instantiate/v</<@https://[cut]/wp-includes/js/dist/data.min.js?ver=a9e98fe3ad76884fe7909ba8348395b7:2:15082
b@https://[cut]/wp-includes/js/dist/data.min.js?ver=a9e98fe3ad76884fe7909ba8348395b7:2:8589
i/</</<@https://[cut]/wp-includes/js/dist/redux-routine.min.js?ver=fd5f93d1f8206c65d1891cf1f898211e:2:1602
A/</<@https://[cut]/wp-includes/js/dist/data.min.js?ver=a9e98fe3ad76884fe7909ba8348395b7:2:10455
L/</</<@https://[cut]/wp-includes/js/dist/data.min.js?ver=a9e98fe3ad76884fe7909ba8348395b7:2:10762
dispatch@https://[cut]/wp-includes/js/dist/data.min.js?ver=a9e98fe3ad76884fe7909ba8348395b7:2:9449
a/<@https://[cut]/wp-includes/js/dist/redux-routine.min.js?ver=fd5f93d1f8206c65d1891cf1f898211e:2:1353
r/<@https://[cut]/wp-includes/js/dist/redux-routine.min.js?ver=fd5f93d1f8206c65d1891cf1f898211e:2:9258
r@https://[cut]/wp-includes/js/dist/redux-routine.min.js?ver=fd5f93d1f8206c65d1891cf1f898211e:2:9233
u/<@https://[cut]/wp-includes/js/dist/redux-routine.min.js?ver=fd5f93d1f8206c65d1891cf1f898211e:2:9187