HTTP 500 error, I want generate a CFDI

I want to generate a CFDI of a payment but when I click to generate this it throws me the HTTP 500 error

Code Error:

[Wed Jun 16 09:38:15.850332 2021] [proxy_fcgi:error] [pid 29698:tid 140496604165888] [client 187.189.55.231:0] AH01071: Got error 'PHP message: PHP Warning:  Use of undefined constant label - assumed 'label' (this will throw an Error in a future version of PHP) in /home/reactor/web/dolibarr.reactorads.com/public_html/core/class/html.form.class.php on line 7210PHP message: PHP Warning:  Use of undefined constant label - assumed 'label' (this will throw an Error in a future version of PHP) in /home/reactor/web/dolibarr.reactorads.com/public_html/core/class/html.form.class.php on line 7210PHP message: PHP Warning:  Use of undefined constant label - assumed 'label' (this will throw an Error in a future version of PHP)

Hello,

The message you reported is only a warning not an error 500

Ok, thanks, but the question is why it does not generate my CFDI, when I click to generate this it sends me to the page that says HTTP error 500.
This page does not work The page [reactorads] cannot process this request now.
HTTP ERROR 500

any idea how i can fix it?

Hello,

This error has been corrected : FIX 13.0 warning - missing quotes around 'label' by atm-florianm · Pull Request #17068 · Dolibarr/dolibarr · GitHub

Either you apply the patch manually or you wait the version 13.0.3