A PHP error was encountered

Message:

json_decode(): Passing null to parameter #1 ($json) of type string is deprecated

Location:

/home/o9mh2ewaflig/public_html/rhvac.com/application/models/system/config.php on line 141

Trace:

#1 [internal function]: {closure}()
#2 /home/o9mh2ewaflig/public_html/rhvac.com/application/models/system/config.php(141): json_decode()
#3 /home/o9mh2ewaflig/public_html/rhvac.com/application/libraries/bootstrap.php(136): System_Config_Model->getSettings()
#4 /home/o9mh2ewaflig/public_html/rhvac.com/application/libraries/bootstrap.php(26): Bootstrap->getSettings()
#5 /home/o9mh2ewaflig/public_html/rhvac.com/application/libraries/bootstrap.php(11): Bootstrap->initialize()
#6 /home/o9mh2ewaflig/public_html/rhvac.com/system/core/codebreeder/loader.php(367): Bootstrap->__construct()
#7 /home/o9mh2ewaflig/public_html/rhvac.com/system/core/codebreeder/loader.php(137): CodeBreeder_Loader::instantiate()
#8 /home/o9mh2ewaflig/public_html/rhvac.com/system/core/codebreeder/codebreeder.php(240): CodeBreeder_Loader::library()
#9 /home/o9mh2ewaflig/public_html/rhvac.com/system/core/codebreeder/codebreeder.php(163): CodeBreeder_Core::loadClasses()
#10 /home/o9mh2ewaflig/public_html/rhvac.com/system/core/codebreeder/codebreeder.php(82): CodeBreeder_Core::execute()
#11 /home/o9mh2ewaflig/public_html/rhvac.com/index.php(114): CodeBreeder_Core::initialize()
#12 {main}