cannot save the changes via theme panel

hi

i have the wordpres version 4.9.2 and the newspaper theme up to date, but everytime i try to change something in theme panel like put new ads it doesnt save the changes.

thanks

i checked all the parameters and i still have the issue, inthe browser console those warnings and errors appered :

JQMIGRATE: Migrate is installed, version 1.4.1
VM1187:1 Uncaught TypeError: Cannot read property ‘appendChild’ of undefined
at <anonymous>:1:175
(anonymous) @ VM1187:1
is?id=B619F25E-008E-5DB9-8599-D3E2BB3BA2C7&d=5a01fca9-d552-45e9-a47c-f34d2a14e626&cl=upd:1 Uncaught SyntaxError: Unexpected token :
ace.js?ver=8.5.1:1 Automatically scrolling cursor into view after selection change this will be disabled in the next version set editor.$blockScrolling = Infinity to disable this message
o @ ace.js?ver=8.5.1:1
onCursorChange @ ace.js?ver=8.5.1:1
r._emit.r._dispatchEvent @ ace.js?ver=8.5.1:1
(anonymous) @ ace.js?ver=8.5.1:1
r._signal @ ace.js?ver=8.5.1:1
setPosition @ ace.js?ver=8.5.1:1
onChange @ ace.js?ver=8.5.1:1
r._signal @ ace.js?ver=8.5.1:1
applyDelta @ ace.js?ver=8.5.1:1
insertMergedLines @ ace.js?ver=8.5.1:1
insert @ ace.js?ver=8.5.1:1
setValue @ ace.js?ver=8.5.1:1
setValue @ ace.js?ver=8.5.1:1
(anonymous) @ admin.php?page=td_theme_panel:8583
(anonymous) @ admin.php?page=td_theme_panel:8596
ace.js?ver=8.5.1:1 Automatically scrolling cursor into view after selection change this will be disabled in the next version set editor.$blockScrolling = Infinity to disable this message

what can i do now to fix the problem?