Error in token.php

Hi! I have a Moodle 4.5 installed and I´m configuring external webservices I´ve been using in another moodle 4.0 with no problems. But now, in this new version, when I add a token adding name, user an service, it generates the token but I get this error:

"Excepción - core_webservice\reportbuilder\local\systemreports\tokens::get_missing_capabilities(): Argument #3 ($serviceshortname) must be of type string, null given, called in [dirroot]/webservice/classes/reportbuilder/local/systemreports/tokens.php on line 146"

And if I go to admin/webservice/tokens.php I can only see the error, not the list of tokens.

Can you help me to solve this?

Thanks in advance!!