[Exist-open] Error: "Schema for namespace undefined not defined for type string"

[Alessandro <ca...@tu...>]

Hi all!
I use the following chunck of code in order to insert links within a repeat (inside a table):

<td style="width: 400px;">
                        <xf:trigger submission="replace-form-with" appearance="minimal" class="url">
                            <xf:label>
                                <xf:output class="url"  ref="link-text"/>
                            </xf:label>
                           
                            <xf:hint>
                                <!-- <xf:output class="url" value="concat('{$host}','exist/apps/DATI/', '{$trow_storage}','/',instance('files')/tr[index('files-repeat')]/link/link_file_name,'.',instance('files')/tr[index('files-repeat')]/link/link_estensione)" /> -->
                               
                                <xf:output class="url" value="concat('{$host}','exist/apps/DATI/', '{$trow_storage}','/',instance('files')/files/file[index('files-repeat')]/link-file-name,'.',instance('files')/files/file[index('files-repeat')]/link-est)" />
                            </xf:hint>
                           
                            <xf:action ev:event="DOMActivate">
                                <xf:setvalue class="url" ref="instance('URL-container')" value="concat('{$host}','exist/apps/DATI/', '{$trow_storage}','/',instance('files')/files/file[index('files-repeat')]/link-file-name,'.',instance('files')/files/file[index('files-repeat')]/link-est)" />
                               
                                <xf:load ref="instance('URL-container')" />
                            </xf:action>
                        </xf:trigger>
                     </td>

By clicking on the trigger using exist-db 5.2 there's no problem, instead with 5.3 just installed I get this error message: "Schema for namespace undefined not defined for type string"...
Thanks
Alex

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