Bug with Confluence Page Gadget in JIRA Dashboard

Hello,

I want to add confluence gadget "Confluence Page Gadget" in JIRA dashboard.
The gadget is added in JIRA dashboard but when I try to set up, I have a BUG.
When I enter the page title, the gadget find the page (cf. Image 001) but when I select the concerning, JIRA dashboard disappears and it is replace by corresponding Confluence article of my search.

Consequently, I can't set up the gagdet because I can't select the page.

I try to enter the complete name of article but I receive error message (image 003.png)