error when uploading multiple images at the same time

[PRO VERSION] is not working here, some images with error when uploading ( Upload in progress but some files already failed! ) My Shorcode is:

[wordpress_file_upload uploadpath="/uploads/" fitmode="responsive" createpath="true" forcefilename="true" showtargetfolder="true" askforsubfolders="true" subfoldertree="auto+" adminmessages="true" debugmode="true" placements="title/filename+selectbutton+uploadbutton/userdata/userdata/consent/filelist/message" uploadtitle="Envie Aqui suas Fotos" selectbutton="Selecionar Foto/Selecionar Fotos" uploadbutton="Iniciar Upload foto/Iniciar Upload Fotos" captchaprompt="Por favor, preencha as palavras acima:" successmessage="file %filename% Todos os arquivos enviados com sucesso." warningmessage="file %filename% carregado com sucesso, mas com avisos." errormessage="file %filename% n?o carregado" waitmessage="file %filename% está sendo carregado" requiredlabel="(obrigatório)" notify="true" notifyrecipients="myemail" notifysubject="Upload Fotos Notifica??o" notifymessage="Olá Rupes,%n%%n% Email de aviso de upload de fotos no site.%n%%n%Best Regards" askconsent="true" personaldatatypes="userdata and files" consentquestion="Ao ativar esta op??o concordo em deixar o site manter meus dados pessoais e fotos para fazer meu pedido." userdata="true" userdatalabel="seu email|t:email|s:right|r:1|a:0|v:1|p:inline|d:|g:0" userdatalabel2="seu nome|t:text|s:right|r:1|a:0|p:inline|d:" gdrive="true" gdrivepath="my-drive/" gdriveuserdata="true" gdrivelocal="delete"]

My File Htaccess:

<IfModule php7_module>
   php_flag display_errors Off
   php_value max_execution_time 300
   php_value max_input_time 600
   php_value max_input_vars 3000
   php_value memory_limit 526M
   php_value post_max_size 512M
   php_value session.gc_maxlifetime 1440
   php_value session.save_path "/var/cpanel/php/sessions/ea-php74"
   php_value upload_max_filesize 512M
   php_flag zlib.output_compression Off

I’ve already changed a lot, I can’t find the reason for the error, if possible, navigate my website to the checkout page where the plugin is, and upload some images.

The page I need help with: [log in to see the link]