Timeline Post Problem

Hello,

have now on my una sites a problem to post a comment or link, if i click on post, get only a blank page (url: https://domain.com/m/timeline/post/) with this: {"id":"1453"}

when i go back and refresh the page, the comment is shown to timeline.

if i try to post a link, for example google.com, i get this:

{"id":3,"event_id":0,"url":"https:\/\/google.com","item":"\n    \n                   Google<\/a><\/div>\n                        

\n            Delete<\/a>\n            \n        <\/div>\n    <\/div>\n<\/div>"}

on this url: https://domain.com/m/timeline/submit_attach_link_form/

if i go back and refresh the page, i see the link and preview in the area, where i can write a comment, if i then click post, come the same error like send comment, get this: {"id":"1455"} on a blank page

tried to reinstall the timeline, but it helps not. does anybody knows a solution?

found this topic: https://una.io/page/view-discussion?id=1812 but works not.