problem editing a new item

Hi, I installed FLEXIcontent on joomla 4 platform.at the end of the installation if I open an items I get a series of loading errorsDeprecated : strpos(): Passing null to parameter

hello disable error reporting in joomla global configuration

debugging is disabled
if I open a types I get 30 entries with this message
Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /home/xxx/public_html/xxxx/administrator/components/com_flexicontent/views/type/view.html.php on line 292


and if I open I open an item from the frontend
before my items I find a series of info that I report to you
Dettagli
Visite: 1

View access
Public
Version information
item_screen
Language associations
lang_assocs
JImages
jimages
JUrls
jurls
META data
{"robots":null,"author":"","rights":"","xreference":""}
SEO configuration
seoconf
Displaying parameters
display_params
Layout parameters
layout_params
Permissions
perms
Versions
versions
Publish down (date)
publish_down
Publish up (date)
2016-06-04 13:52:17
ID
6
Alias
chi-siamo
Category (main)
Servizio
Language
Tutto
Publish changes
vstate
Disable comments
disable_comments
Notify owner
notify_owner
Captcha
captcha
Layout selection
layout_selection
Timezone info
timezone_info
Created by alias
Notify subscibers
notify_subscribers

if I enter the fields item it appears like this

as i say change error reporting no debugging
about fields www.flexicontent.org/forum/21-troublesho...after-an-update.html

Thanks, I fixed the frontend
instead on the backend the messages are left, they appear when I open an item and save it, in field as per attached image, also in file
Can you give me some advice on how to fix the problem