[TYPO3-english] ExtDirect Exception in Typo3-4.5.4

[J. Bakshi]

Hello list,

I have found an issue in Typo3 4.5.4

During hide/unhide a page typo3 throws an error as ExtDirect Exception with the following detail

` ` ` `
\r\n\r\n0\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n[{"tid":18,"action":"Commands","method":"visiblyNode","type":"rpc","result":{"serializeClassName":"t3lib_tree_pagetree_Node","id":"mp-0-41","type":"pages","editableText":"Impressum","text":"Impressum","cls":null,"prefix":"","suffix":"","qtip":"id=41","expanded":true,"expandable":false,"draggable":true,"isTarget":true,"spriteIconCode":"
<\/span>","t3TextSourceField":"title","t3InCopyMode":false,"t3InCutMode":false,"t3ContextInfo":[],"editable":true,"allowChildren":true,"nodeData":{"serializeClassName":"t3lib_tree_pagetree_Node","id":"41","type":"pages","editableText":"Impressum","text":"Impressum","cls":null,"prefix":"","suffix":"","qtip":"id=41","expanded":true,"expandable":false,"draggable":true,"isTarget":true,"spriteIconCode":"
<\/span>","t3TextSourceField":"title","t3InCopyMode":false,"t3InCutMode":false,"t3ContextInfo":[],"editable":true,"allowChildren":true,"readableRootline":"","mountPoint":0,"workspaceId":41,"isMountPoint":false},"realId":"41","readableRootline":""},"debug":""}]
` ` ` `
What is it actually and how can I fix it ?

TIA