Error in Developer’s Tool while failed to add a widget in page content

Can anyone scrutinize and advise me a clue please….
Error in Developer’s Tool (Browser) while failed to add a widget in page content:

Uncaught SyntaxError: Unexpected token ‘<‘
at b (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2)
at Pe (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2)
at s.fn.init.append (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2)
at Object.render (kc.params.js?ver=2.9.6:644)
at S.Event.tabs [as data] (kc.params.js?ver=2.9.6:983)
at HTMLLIElement.<anonymous> (kc.tools.js?ver=2.9.6:951)
at HTMLLIElement.dispatch (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2)
at HTMLLIElement.v.handle (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2)
at Object.trigger (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2)
at HTMLLIElement.<anonymous> (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2)
b @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
Pe @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
append @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
render @ kc.params.js?ver=2.9.6:644
tabs @ kc.params.js?ver=2.9.6:983
(anonymous) @ kc.tools.js?ver=2.9.6:951
dispatch @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
v.handle @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
trigger @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
(anonymous) @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
each @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
each @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
trigger @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
settings @ kc.builder.js?ver=2.9.6:380
edit @ kc.views.js?ver=2.9.6:1168
dispatch @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
v.handle @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
trigger @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
(anonymous) @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
each @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
each @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
trigger @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
dopush @ kc.builder.js?ver=2.9.6:975
items @ kc.builder.js?ver=2.9.6:571
dispatch @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2
v.handle @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-mouse,moxiejs,plupload,jquery-ui-slider&ver=5.7.2:2`