In Manager.php line 129:
[ErrorException]
[E_DEPRECATED] strtoupper(): Passing null to parameter #1 ($string) of type string is deprecated
Exception trace:
at /<path to xf>/src/XF/AddOn/Manager.php:129
XF::handlePhpError() at n/a:n/a
strtoupper() at /<path to xf>/src/XF/AddOn/Manager.php:129
XF\AddOn\Manager->coerceAddOnId() at /<path to xf>/src/XF/AddOn/Manager.php:111
XF\AddOn\Manager->getById() at /<path to xf>/src/XF/Cli/Command/Development/GenerateFinders.php:37
XF\Cli\Command\Development\GenerateFinders->execute() at /<path to xf>/src/vendor/symfony/console/Command/Command.php:298
Symfony\Component\Console\Command\Command->run() at /<path to xf>/src/XF/Cli/Command/Development/RequiresDevModeTrait.php:20
XF\Cli\Command\Development\GenerateFinders->run() at /<path to xf>/src/vendor/symfony/console/Application.php:1040
Symfony\Component\Console\Application->doRunCommand() at /<path to xf>/src/vendor/symfony/console/Application.php:301
Symfony\Component\Console\Application->doRun() at /<path to xf>/src/vendor/symfony/console/Application.php:171
Symfony\Component\Console\Application->run() at /<path to xf>/src/XF/Cli/Runner.php:111
XF\Cli\Runner->run() at /<path to xf>/cmd.php:15