Here is the backtrace for it:
Backtrace:
from /var/www/html/mediawiki-1.39.5/extensions/LDAPProvider/src/DomainConfigProvider/LocalJSONFile.php(51)
#0 /var/www/html/mediawiki-1.39.5/extensions/LDAPProvider/src/DomainConfigProvider/LocalJSONFile.php(70): MediaWiki\Extension\LDAPProvider\DomainConfigProvider\LocalJSONFile->__construct()
#1 [internal function]: MediaWiki\Extension\LDAPProvider\DomainConfigProvider\LocalJSONFile::newInstance()
#2 /var/www/html/mediawiki-1.39.5/extensions/LDAPProvider/src/DomainConfigFactory.php(101): call_user_func_array()
#3 /var/www/html/mediawiki-1.39.5/extensions/LDAPProvider/src/ClientFactory.php(62): MediaWiki\Extension\LDAPProvider\DomainConfigFactory::getInstance()
#4 /var/www/html/mediawiki-1.39.5/extensions/LDAPAuthentication2/src/PluggableAuth.php(254): MediaWiki\Extension\LDAPProvider\ClientFactory->getForDomain()
#5 /var/www/html/mediawiki-1.39.5/extensions/LDAPAuthentication2/src/PluggableAuth.php(123): MediaWiki\Extension\LDAPAuthentication2\PluggableAuth->checkLDAPLogin()
#6 /var/www/html/mediawiki-1.39.5/extensions/PluggableAuth/includes/PluggableAuthLogin.php(101): MediaWiki\Extension\LDAPAuthentication2\PluggableAuth->authenticate()
#7 /var/www/html/mediawiki-1.39.5/includes/specialpage/SpecialPage.php(701): MediaWiki\Extension\PluggableAuth\PluggableAuthLogin->execute()
#8 /var/www/html/mediawiki-1.39.5/includes/specialpage/SpecialPageFactory.php(1428): SpecialPage->run()
#9 /var/www/html/mediawiki-1.39.5/includes/MediaWiki.php(316): MediaWiki\SpecialPage\SpecialPageFactory->executePath()
#10 /var/www/html/mediawiki-1.39.5/includes/MediaWiki.php(904): MediaWiki->performRequest()
#11 /var/www/html/mediawiki-1.39.5/includes/MediaWiki.php(562): MediaWiki->main()
#12 /var/www/html/mediawiki-1.39.5/index.php(52): MediaWiki->run()
#13 /var/www/html/mediawiki-1.39.5/index.php(48): wfIndexMain()
#14 {main}