Error when saving item

Support
1

All items editing using TAO editor:

200: <br /> <b>Warning</b>: DOMDocument::schemaValidate(): Invalid Schema in <b>/opt/tao-ce/construct/backend/t ao/models/classes/class.Parser.php</b > on line <b>200</b><br /> {"success":false,"type":"Error","message ":"An error occurred at the level of the QTI model."}
2

In web console:

console.js:24 controller/creator  Error
    at Object.log (api.js:149:1)
    at apply (lodash.js:466:1)
    at Object.wrapper [as error] (lodash.js:5343:1)
    at Object.reportError (index.js:104:1)
    at eventifier.js:280:1
    at Array.map (<anonymous>)
    at triggerHandlers (eventifier.js:280:1)
    at triggerBetween (eventifier.js:175:1)
    at eventifier.js:257:1
    at eventifier.js:257:1 {level: 'error', v: 0, time: '2026-06-30T15:28:30.342Z', msg: '', err: Error
    at Object.log (/backoffice/tao/views/js/loader/v…, …}