Can you manually add new items?
If that works, create one with the name “mfu_images” and save it. Then right-click on it and choose “Export/Import” and copy this Json.
{
"formtabs":[
{
"MIGX_id":7,
"caption":"image",
"print_before_tabs":"0",
"fields":[
{
"MIGX_id":10,
"field":"image",
"caption":"Image",
"description":"",
"description_is_code":"0",
"inputTV":"",
"inputTVtype":"image",
"validation":"",
"configs":"",
"restrictive_condition":"",
"display":"",
"sourceFrom":"config",
"sources":[
{
"MIGX_id":1,
"context":"web",
"sourceid":3
},
{
"MIGX_id":2,
"context":"mgr",
"sourceid":3
}
],
"inputOptionValues":"",
"default":"",
"useDefaultIfEmpty":"0",
"pos":1
}
],
"pos":1
}
],
"contextmenus":"",
"actionbuttons":"",
"columnbuttons":"",
"filters":"",
"extended":{
"migx_add":"",
"disable_add_item":"",
"add_items_directly":"",
"formcaption":"",
"update_win_title":"",
"win_id":"",
"maxRecords":"",
"addNewItemAt":"bottom",
"multiple_formtabs":"",
"multiple_formtabs_label":"",
"multiple_formtabs_field":"",
"multiple_formtabs_optionstext":"",
"multiple_formtabs_optionsvalue":"",
"actionbuttonsperrow":4,
"winbuttonslist":"",
"extrahandlers":"",
"filtersperrow":4,
"packageName":"migxfineuploader",
"classname":"",
"task":"",
"getlistsort":"",
"getlistsortdir":"",
"sortconfig":"",
"gridpagesize":"",
"use_custom_prefix":"0",
"prefix":"",
"grid":"",
"gridload_mode":1,
"check_resid":1,
"check_resid_TV":"",
"join_alias":"",
"has_jointable":"yes",
"getlistwhere":"",
"joins":"",
"hooksnippets":{
"mfugetproperties":"mfuUploaderGetProperties"
},
"cmpmaincaption":"",
"cmptabcaption":"",
"cmptabdescription":"",
"cmptabcontroller":"",
"winbuttons":"",
"onsubmitsuccess":"",
"submitparams":""
},
"permissions":"",
"fieldpermissions":"",
"columns":[
{
"MIGX_id":1,
"header":"Image",
"dataIndex":"image",
"width":"",
"sortable":"false",
"show_in_grid":1,
"customrenderer":"",
"renderer":"this.renderImage",
"clickaction":"",
"selectorconfig":"",
"renderchunktpl":"",
"renderoptions":"",
"editor":""
}
],
"category":""
}